TWI704330B - Optical encoder - Google Patents

Optical encoder Download PDF

Info

Publication number
TWI704330B
TWI704330B TW108107842A TW108107842A TWI704330B TW I704330 B TWI704330 B TW I704330B TW 108107842 A TW108107842 A TW 108107842A TW 108107842 A TW108107842 A TW 108107842A TW I704330 B TWI704330 B TW I704330B
Authority
TW
Taiwan
Prior art keywords
light
module
sensing
parallel
emitting
Prior art date
Application number
TW108107842A
Other languages
Chinese (zh)
Other versions
TW202033934A (en
Inventor
曾吉旺
Original Assignee
曾吉旺
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 曾吉旺 filed Critical 曾吉旺
Priority to TW108107842A priority Critical patent/TWI704330B/en
Priority to CN202010097510.0A priority patent/CN111664878B/en
Application granted granted Critical
Publication of TWI704330B publication Critical patent/TWI704330B/en
Publication of TW202033934A publication Critical patent/TW202033934A/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)

Abstract

Disclosed is an optical encoder, including: a light emitting module, a light guiding module and a light sensing module. The light guiding module is adjacent to the light emitting module. The light sensing module includes a plurality of sensing elements adjacent to the light guiding module, wherein each of the sensing elements has a bare sensing region, and a plurality of bare regions of the plurality of sensing elements are laterally offset from each other and extend laterally along a plurality of mutually parallel different horizontal lines. The optical encoder provided by the invention can match the light beam projected on the light sensing module with the plurality of bare sensing regions of the plurality of sensing elements, thereby improving the resolution capability of the optical encoder.

Description

光學式編碼器 Optical encoder

本發明涉及一種編碼器，特別是涉及一種光學式編碼器。 The invention relates to an encoder, in particular to an optical encoder.

現今電腦的監視器(monitor)利用滑鼠(Mouse)來移動所欲處理資料的位置至監視器上之特定資料位置。一般滑鼠的主要構造包括兩組可輸出序列邏輯信號(例如11,10,00,01)的X軸和Y軸編碼器，透過將滑鼠底面扺住桌面或其他平面向特定方位移動而使監視器所欲處理資料位置作相對的移位。以滑鼠移動監視器上資料位置的原理基本上是利用同時操作X軸和Y軸編碼器而產生一平面上的點的移動。換言之，單獨操作X軸編碼器或是Y軸編碼器只能作線上點之移動。編碼器一般是由發光模組(例如發光二極體)、葉片栅輪以及光感測模組所組成。葉片栅輪具有一類似機械齒輪的結構，操作時，藉由葉片栅輪之轉動，由發光模組發出的光束被葉片柵輪遮蔽或不被遮蔽。其中，經遮蔽的光束不會投射至光感測模組而使光感測模組產生OFF(0)的訊號，另一方面，不被遮蔽的光束則被光感測模組接收，而使感測器產生ON(1)的訊號。上述OFF(0)及ON(1)的訊號被依序產生後，形成一序列信號。舉例而言，當葉片柵輪以順時針方向轉動時，感測器所產生之序列信號為11,10,00,01,11,10,00,01...的連續重複信號，逆時針轉動時，則為01,00,10,11,01,00,10,11,10...的連續重複信號，而此等序列信號被用於電路編碼。 The current computer monitor uses a mouse to move the position of the data to be processed to a specific data position on the monitor. The main structure of a general mouse includes two sets of X-axis and Y-axis encoders that can output sequential logic signals (such as 11, 10, 00, 01), which can be moved to a specific direction by holding the bottom of the mouse against the desktop or other planes. The position of the data to be processed by the monitor is relatively shifted. The principle of using the mouse to move the position of the data on the monitor is basically to use the simultaneous operation of the X-axis and Y-axis encoders to produce a point movement on a plane. In other words, operating the X-axis encoder or Y-axis encoder alone can only move points on the line. The encoder is generally composed of a light emitting module (such as a light emitting diode), a blade grid wheel, and a light sensing module. The blade grid wheel has a structure similar to a mechanical gear. During operation, the light beam emitted by the light-emitting module is shielded or not shielded by the blade grid wheel during operation. Among them, the shielded light beam will not be projected to the light sensing module to cause the light sensing module to generate an OFF (0) signal. On the other hand, the unshielded light beam is received by the light sensing module, so that The sensor generates an ON(1) signal. After the above-mentioned OFF(0) and ON(1) signals are sequentially generated, a sequence of signals is formed. For example, when the blade grid wheel rotates in a clockwise direction, the sequence signal generated by the sensor is a continuous repetitive signal of 11,10,00,01,11,10,00,01..., rotating counterclockwise When, it is a continuous repeating signal of 01,00,10,11,01,00,10,11,10..., and these sequence signals are used for circuit coding.

一般而言，葉片栅輪所包含的葉片數愈多、和兩感測器間的距離愈小，則解析度(以CPR表示，Count per Round)愈高。然而，當葉片栅輪的相鄰兩葉片之夾角減小，亦即，葉片數增多時， 柵輪外徑將會加大。若不欲加大柵輪的外徑，需要減少葉片的寬度，然而，因光的繞射現象使得葉片寬度之減小有其極限。詳言之，在過多的葉片數量之下，光束通過柵輪的葉片時會產生繞射現象，而光束無法被柵輪的葉片遮蔽，導致無論柵輪順或逆時針轉動時，由兩感測器產生之信號皆為連續重複ON(1)之信號，無法因滑鼠滑動的方向不同而產生不同的序列信號。 Generally speaking, the more the number of blades included in the blade grid wheel and the smaller the distance between the two sensors, the higher the resolution (expressed in CPR, Count per Round). However, when the angle between two adjacent blades of the blade grid decreases, that is, when the number of blades increases, The outer diameter of the grid wheel will increase. If you do not want to increase the outer diameter of the grid wheel, you need to reduce the width of the blade. However, the reduction of the width of the blade has its limit due to the phenomenon of light diffraction. In detail, when the number of blades is too large, the light beam will be diffracted when passing through the blades of the grid wheel, and the light beam cannot be shielded by the blades of the grid wheel, resulting in whether the grid wheel rotates clockwise or counterclockwise, the two sensing The signal generated by the device is a signal that continuously repeats ON(1), and it is impossible to generate different sequence signals due to different directions of mouse sliding.

因此，如何在不使用複雜結構的條件下改進或提升導光式編碼器的解析度，仍是本領域中亟待努力之課題。 Therefore, how to improve or enhance the resolution of the light-guiding encoder without using a complicated structure is still an urgent task in this field.

本發明所要解決的技術問題在於，針對現有技術的不足提供一種光學式編碼器。 The technical problem to be solved by the present invention is to provide an optical encoder for the shortcomings of the prior art.

為了解決上述的技術問題，本發明所採用的其中一技術方案是，提供一種光學式編碼器，其包含：一發光模組、一導光模組以及一光感測模組。所述導光模組鄰近所述發光模組。所述光感測模組包含多個鄰近所述導光模組的感測元件，其中每一所述感測元件具有一裸露感測區，多個所述感測元件的多個裸露感測區彼此橫向錯位且分別横向沿著多個互相平行的不同水平線延伸設置。 In order to solve the above technical problems, one of the technical solutions adopted in the present invention is to provide an optical encoder, which includes: a light emitting module, a light guide module, and a light sensing module. The light guide module is adjacent to the light emitting module. The light sensing module includes a plurality of sensing elements adjacent to the light guide module, wherein each of the sensing elements has a bare sensing area, and a plurality of bare sensing elements of the plurality of sensing elements The zones are laterally displaced from each other and extend laterally along a plurality of different horizontal lines parallel to each other.

為了解決上述的技術問題，本發明所採用的另外一技術方案是，提供一種光學式編碼器，其包含：一發光模組、一導光模組以及一光感測模組。所述導光模組鄰近所述發光模組，所述導光模組包括一導光本體及一非球面凸出部。所述光感測模組鄰近所述導光模組。其中，所述發光模組所產生的入射光束通過所述導光模組，以形成投射在所述光感測模組上的一平行光束或一接***行光的***行光束。其中，所述平行光束或所述***行光束的光束寬度由所述非球面凸出部的頂點曲面的曲率來調整。 In order to solve the above technical problem, another technical solution adopted by the present invention is to provide an optical encoder, which includes: a light emitting module, a light guide module, and a light sensing module. The light guide module is adjacent to the light emitting module, and the light guide module includes a light guide body and an aspheric protrusion. The light sensing module is adjacent to the light guide module. Wherein, the incident light beam generated by the light emitting module passes through the light guide module to form a parallel light beam or a nearly parallel light beam projected on the light sensing module. Wherein, the beam width of the parallel light beam or the near-parallel light beam is adjusted by the curvature of the vertex curved surface of the aspherical protrusion.

本發明的其中一有益效果在於，本發明所提供的光學式編碼器，其能通過“一導光模組，所述導光模組鄰近所述發光模組” 以及“一光感測模組，所述光感測模組包含多個鄰近所述導光模組的感測元件，其中每一所述感測元件具有一裸露感測區，多個所述感測元件的多個裸露感測區彼此橫向錯位且分別横向沿著多個互相平行的不同水平線延伸設置”的技術方案，以使投射在光感測模組上的平行光束或***行光束與多個感測元件的裸露感測區相互配合，進而提高編碼器的解析能力；並且，本發明所提供的光學式編碼器也可避免光之繞射現象的產生。 One of the beneficial effects of the present invention is that the optical encoder provided by the present invention can pass through "a light guide module, the light guide module being adjacent to the light emitting module" And "a light sensing module, the light sensing module includes a plurality of sensing elements adjacent to the light guide module, wherein each of the sensing elements has a bare sensing area, a plurality of the The multiple exposed sensing regions of the sensing element are laterally displaced from each other and extend laterally along a plurality of different horizontal lines parallel to each other." The technical solution makes the parallel or nearly parallel beam projected on the light sensing module and The exposed sensing areas of multiple sensing elements cooperate with each other, thereby improving the resolution capability of the encoder; and the optical encoder provided by the present invention can also avoid the phenomenon of light diffraction.

本發明的另外一有益效果在於，本發明所提供的光學式編碼器，其能通過“一導光模組，所述導光模組鄰近所述發光模組，所述導光模組包括一導光本體及一非球面凸出部”、“所述發光模組所產生的入射光束通過所述導光模組，以形成投射在所述光感測模組上的一平行光束或一接***行光的***行光束”以及“所述平行光束或所述***行光束的光束寬度由所述非球面凸出部的頂點曲面的曲率來調整”的技術方案，以使投射在光感測模組上的平行光束或***行光束與多個感測元件的裸露感測區相互配合，進而提高編碼器的解析能力；並且，本發明所提供的光學式編碼器也可避免光之繞射現象的產生。 Another beneficial effect of the present invention is that the optical encoder provided by the present invention can pass through "a light guide module, the light guide module is adjacent to the light emitting module, the light guide module includes a The light guide body and an aspheric protrusion", "the incident light beam generated by the light-emitting module passes through the light guide module to form a parallel light beam or a close beam projected on the light-sensing module The technical solutions of “parallel beams of near-parallel beams” and “the beam width of the parallel beams or the near-parallel beams are adjusted by the curvature of the vertex surface of the aspherical protrusions”, so as to project on the light sensing module The parallel or near-parallel beams on the group cooperate with the exposed sensing areas of the multiple sensing elements, thereby improving the resolution capability of the encoder; and the optical encoder provided by the present invention can also avoid the phenomenon of light diffraction The production.

為使能更進一步瞭解本發明的特徵及技術內容，請參閱以下有關本發明的詳細說明與圖式，然而所提供的圖式僅用於提供參考與說明，並非用來對本發明加以限制。 In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

Z:光學式編碼器 Z: Optical encoder

1:發光模組 1: Light-emitting module

10:發光源 10: Luminous source

11:透光本體 11: Translucent body

110:弧形出光面 110: Curved light emitting surface

2:導光模組 2: Light guide module

20:導光本體 20: Light guide body

21:非球面凸出部 21: Aspheric protrusion

210:環形出光面 210: ring light emitting surface

211:條狀入光面 211: Strip light incident surface

212:條狀出光面 212: Strip Glossy Surface

213:折射面 213: Refraction surface

3:光感測模組 3: Light sensing module

30:感測元件 30: sensing element

31:第一感測元件 31: The first sensing element

32:第二感測元件 32: second sensing element

33:第三感測元件 33: third sensing element

34:第四感測元件 34: fourth sensing element

300:裸露感測區 300: Bare sensing area

310:第一裸露感測區 310: The first bare sensing area

320:第二裸露感測區 320: The second bare sensing area

330:第三裸露感測區 330: The third bare sensing area

340:第四裸露感測區 340: The fourth bare sensing area

310a~310d、320a、320b:編碼區 310a~310d, 320a, 320b: coding area

4:光柵 4: grating

41、41a~41d:第一開口 41, 41a~41d: first opening

42、42a、42b:第二開口 42, 42a, 42b: second opening

43:第三開口 43: third opening

44:第四開口 44: fourth opening

5:反射鏡 5: Mirror

A:非球面結構 A: Aspheric structure

a1:第一表面 a1: first surface

a2:第二表面 a2: second surface

a3:第三表面 a3: third surface

a4:第四表面 a4: fourth surface

d:投影寬度 d: projection width

H1、H2、H3、H4:水平線 H1, H2, H3, H4: horizontal line

L:光束 L: beam

L1:入射光束 L1: incident beam

L2、L3:***行光束 L2, L3: Near parallel beam

R:折射光束 R: refracted beam

S:球面結構 S: spherical structure

D1、D2、D3、W、W1、W2、W3:寬度 D1, D2, D3, W, W1, W2, W3: width

圖1為本發明第一實施例的光學式編碼器的第一結構示意圖。 FIG. 1 is a schematic diagram of a first structure of an optical encoder according to a first embodiment of the present invention.

圖2為本發明第一實施例的光學式編碼器的第二結構示意圖。 2 is a schematic diagram of a second structure of the optical encoder according to the first embodiment of the present invention.

圖3為本發明第一實施例的發光模組與導光模組的立體示意圖。 3 is a perspective view of the light emitting module and the light guide module according to the first embodiment of the invention.

圖4為習知的導光式編碼器的葉片柵輪的出光面的結構示意圖。 4 is a schematic diagram of the structure of the light-emitting surface of the vane grid wheel of the conventional light guide type encoder.

圖5為本發明第一實施例的條狀出光面的結構示意圖。 5 is a schematic diagram of the structure of the strip light emitting surface of the first embodiment of the present invention.

圖6為本發明第一實施例的導光模組的內部光路的示意圖。 6 is a schematic diagram of the internal optical path of the light guide module according to the first embodiment of the present invention.

圖7為本發明第一實施例的環形出光面的結構示意圖。 FIG. 7 is a schematic diagram of the structure of the annular light-emitting surface of the first embodiment of the present invention.

圖8為本發明第一實施例的反射鏡的光束反射示意圖。 FIG. 8 is a schematic diagram of light beam reflection of the mirror in the first embodiment of the present invention.

圖9為本發明第二實施例所提供的光學式編碼器的***行光束與光感測模組之間相互關係的第一局部示意圖。 9 is a first partial schematic diagram of the relationship between the near-parallel light beam of the optical encoder and the light sensing module provided by the second embodiment of the present invention.

圖10為本發明第二實施例所提供的光學式編碼器的***行光束與光感測模組之間相互關係的第二局部示意圖。 10 is a second partial schematic diagram of the relationship between the near-parallel light beam of the optical encoder and the light sensing module provided by the second embodiment of the present invention.

圖11為本發明第二實施例所提供的光學式編碼器的***行光束與光感測模組之間相互關係的第三局部示意圖。 11 is a third partial schematic diagram of the relationship between the near-parallel light beam of the optical encoder and the light sensing module provided by the second embodiment of the present invention.

圖12為本發明第二實施例所提供的光學式編碼器的***行光束與光感測模組之間相互關係的第四局部示意圖。 12 is a fourth partial schematic diagram of the relationship between the near-parallel light beam of the optical encoder and the optical sensing module provided by the second embodiment of the present invention.

圖13為本發明第二實施例中光感測模組接收光束後產生訊號的示意圖。 FIG. 13 is a schematic diagram of a signal generated by the light sensing module after receiving a light beam in the second embodiment of the present invention.

圖14為本發明第三實施例所提供的光學式編碼器的***行光束與光感測模組之間相互關係的局部示意圖。 14 is a partial schematic diagram of the relationship between the near-parallel light beam of the optical encoder and the light sensing module provided by the third embodiment of the present invention.

圖15為圖14所使用的光感測模組接收光束後產生訊號的示意圖。 FIG. 15 is a schematic diagram of a signal generated by the light sensing module used in FIG. 14 after receiving a light beam.

圖16為本發明第四實施例所提供的光學式編碼器的平行光束或***行光束與光感測模組之間相互關係的局部示意圖。 16 is a partial schematic diagram of the relationship between the parallel light beam or the near-parallel light beam of the optical encoder provided by the fourth embodiment of the present invention and the optical sensing module.

圖17為圖16所使用的光感測模組接收光束後產生訊號的示意圖。 FIG. 17 is a schematic diagram of a signal generated by the light sensing module used in FIG. 16 after receiving a light beam.

以下是通過特定的具體實施例來說明本發明所公開有關“光學式編碼器”的實施方式，本領域技術人員可由本說明書所公開的內容瞭解本發明的優點與效果。本發明可通過其他不同的具體實施例加以施行或應用，本說明書中的各項細節也可基於不同觀點與應用，在不悖離本發明的構思下進行各種修改與變更。另外，本發明的圖式僅為簡單示意說明，並非依實際尺寸的描繪，事先 聲明。以下的實施方式將進一步詳細說明本發明的相關技術內容，但所公開的內容並非用以限制本發明的保護範圍。 The following is a specific specific embodiment to illustrate the implementation of the “optical encoder” disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not depicted in actual size. statement. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

應當可以理解的是，雖然本文中可能會使用到“第一”、“第二”、“第三”等術語來描述各種元件或者信號，但這些元件或者信號不應受這些術語的限制。這些術語主要是用以區分一元件與另一元件，或者一信號與另一信號。另外，本文中所使用的術語“或”，應視實際情況可能包括相關聯的列出項目中的任一個或者多個的組合。 It should be understood that although terms such as “first”, “second”, and “third” may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or one signal from another signal. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

[第一實施例] [First Embodiment]

請參閱圖1至圖8，本發明第一實施例提供一種光學式編碼器Z，其包含：一發光模組1、一導光模組2以及一光感測模組3。導光模組2鄰近發光模組1。光感測模組3包含多個鄰近導光模組2的感測元件30，其中每一個感測元件30具有一裸露感測區300，多個感測元件30的多個裸露感測區300彼此橫向錯位且分別横向沿著多個互相平行的不同水平線延伸設置。 Referring to FIGS. 1 to 8, the first embodiment of the present invention provides an optical encoder Z, which includes: a light emitting module 1, a light guide module 2 and a light sensing module 3. The light guide module 2 is adjacent to the light emitting module 1. The light sensing module 3 includes a plurality of sensing elements 30 adjacent to the light guide module 2, wherein each sensing element 30 has an exposed sensing area 300, and the plurality of sensing elements 30 have a plurality of exposed sensing areas 300 They are laterally displaced from each other and respectively extend laterally along a plurality of different horizontal lines parallel to each other.

舉例而言，如圖1所示，發光模組1鄰近於導光模組2，且與光感測模組3呈直線配置；其中，發光模組1可為至少一發光二極體，但不以此為限。導光模組2可由玻璃、壓克力或聚碳酸酯(PC)，或是上述材料的任意組合所製成，然而，導光模組2的材料不在此限制。光感測模組3包含鄰近導光模組2的多個感測元件30。進一步來說，感測模組3的感測元件30是具有特定尺寸，並依據特定方式被排列於光感測模組3的表面上，用以配合導光模組2而產生訊號。其中，每一個感測元件30具有一裸露感測區300，且多個感測元件30(如圖9所示)的多個裸露感測區300(如圖9所示)彼此橫向錯位且分別横向沿著多個互相平行的不同水平線延伸設置(如圖9、圖14、圖16所示)。因此，發光模組1所產生的光束L通過導光模組2，以形成投射在光感測模組3上 的光束L。 For example, as shown in FIG. 1, the light-emitting module 1 is adjacent to the light-guiding module 2 and is arranged linearly with the light-sensing module 3; wherein, the light-emitting module 1 can be at least one light-emitting diode, but Not limited to this. The light guide module 2 can be made of glass, acrylic or polycarbonate (PC), or any combination of the above materials. However, the material of the light guide module 2 is not limited here. The light sensing module 3 includes a plurality of sensing elements 30 adjacent to the light guide module 2. Furthermore, the sensing elements 30 of the sensing module 3 have a specific size and are arranged on the surface of the light sensing module 3 according to a specific method to cooperate with the light guide module 2 to generate a signal. Wherein, each sensing element 30 has a bare sensing area 300, and the plurality of bare sensing areas 300 (shown in FIG. 9) of the plurality of sensing elements 30 (shown in FIG. 9) are laterally displaced from each other and respectively. The transverse direction extends along a plurality of different horizontal lines parallel to each other (as shown in Fig. 9, Fig. 14, and Fig. 16). Therefore, the light beam L generated by the light-emitting module 1 passes through the light-guiding module 2 to be projected on the light-sensing module 3 The beam L.

藉由上述設計，本發明所提供的光學式編碼器Z可通過導光模組2的設置而使發光模組1所發出的光束L投射於光感測模組3，進而產生具有高解析度的電路編碼信號。 With the above design, the optical encoder Z provided by the present invention can project the light beam L emitted by the light-emitting module 1 onto the light-sensing module 3 through the arrangement of the light-guiding module 2, thereby generating a high-resolution The circuit encodes the signal.

進一步來說，發光模組1所產生的入射光束L1通過導光模組2，以形成投射在光感測模組3上的一平行光束或接***行光的一***行光束L2。舉例來說，發光模組1可包括至少一發光源10以及包覆發光源10的一透光本體11，透光本體11具有一弧形出光面110。其中，發光源10可為發光二極體，並具有兩個接腳，接腳能電性連接於電路板(圖中未繪示)，但不以此為限。透光本體11可由玻璃、壓克力或聚碳酸酯(PC)，或是上述材料的任意組合所製成，但不以此為限；且，弧形出光面110可為球面結構或者非球面結構。因此，發光模組1的至少一發光源10所發出的光束通過透光本體11的弧形出光面110而產生入射光束L1；接著，入射光束L1通過導光模組2，以形成投射在光感測模組3上的平行光束或接***行光的***行光束(後述內容以***行光束L2作為示例，但不以此為限)。 Furthermore, the incident light beam L1 generated by the light emitting module 1 passes through the light guide module 2 to form a parallel light beam or a nearly parallel light beam L2 projected on the light sensing module 3. For example, the light-emitting module 1 may include at least one light-emitting source 10 and a light-transmitting body 11 covering the light-emitting source 10, and the light-transmitting body 11 has an arc-shaped light-emitting surface 110. The light-emitting source 10 can be a light-emitting diode and has two pins, which can be electrically connected to a circuit board (not shown in the figure), but it is not limited to this. The light-transmitting body 11 can be made of glass, acrylic, polycarbonate (PC), or any combination of the above materials, but not limited to this; and the curved light-emitting surface 110 can be a spherical structure or an aspherical surface structure. Therefore, the light beam emitted by at least one light source 10 of the light-emitting module 1 passes through the arc-shaped light-emitting surface 110 of the light-transmitting body 11 to generate an incident light beam L1; then, the incident light beam L1 passes through the light guide module 2 to form an incident light beam. The parallel beam on the sensing module 3 or the near-parallel beam close to the parallel light (the content described later uses the near-parallel beam L2 as an example, but it is not limited to this).

進一步來說，導光模組2還具有面向弧形出光面110的一條狀入光面211以及背對條狀入光面211的一條狀出光面212。舉例來說，如圖2及圖3所示，導光模組2可包括一導光本體20及一非球面凸出部21，導光本體20可呈長條形。導光本體20一端的條狀入光面211面向發光模組1，用於接收於發光模組1所發出的光。導光本體20另一端的非球面凸出部21具有條狀出光面212，並對應於光感測模組3；其中，非球面凸出部21可為非球面結構。入射光束L1通過導光模組2的導光本體20與非球面凸出部21，並通過在導光本體20的內部進行多次的折射，以形成投射在光感測模組3上的平行光束或接***行光的***行光束。 Furthermore, the light guide module 2 further has a strip light incident surface 211 facing the arc-shaped light exit surface 110 and a strip light exit surface 212 opposite to the strip light incident surface 211. For example, as shown in FIGS. 2 and 3, the light guide module 2 may include a light guide body 20 and an aspheric protrusion 21, and the light guide body 20 may be elongated. The strip light incident surface 211 at one end of the light guide body 20 faces the light emitting module 1 and is used for receiving the light emitted by the light emitting module 1. The aspherical protrusion 21 at the other end of the light guide body 20 has a strip-shaped light-emitting surface 212 corresponding to the light sensing module 3; wherein, the aspherical protrusion 21 may be an aspherical structure. The incident light beam L1 passes through the light guide body 20 and the aspheric projection 21 of the light guide module 2, and is refracted multiple times inside the light guide body 20 to form a parallel projected on the light sensing module 3 Beam or near-parallel beam that is close to parallel.

更進一步來說，如圖4所示，習知的導光式編碼器通常利用 具有球心的球面結構S來構成編碼器中葉片柵輪的出光面，使光線由球面結構S射出並投射在感測器上。然而，由於球面本身具有聚焦的功能，由球面結構S射出的光束會被聚焦，進而使光束在不同位置具有不同的寬度。然而，本發明與習知導光式編碼器所使用的球面結構S不同的是，如圖5所示，非球面結構A並不具有球心而具有主軸。由非球面結構A(例如拋物面)所射出的光束將為平行光束或接***行光的***行光束。本發明實施例即是使用非球面結構A，例如雙曲面或拋物面來構成條狀出光面212，如此一來，可確保由條狀出光面212離開導光模組2的光束具有穩定的寬度W；即，平行光束或***行光束L2的光束寬度W等於條狀出光面212的寬度W。因此，可將此具有穩定的寬度W的平行光束或***行光束L2與具有特定寬度及排列方式的感測元件或裸露感測區相互配合，進而達到產生具有較高解析度的編碼信號的功效。舉例來說，由於本發明離開導光模組2的光束具有穩定的寬度W，藉由控制光感測模組3的感測元件30的裸露感測區300的尺寸及排列方式，以及控制導光模組2的條狀出光面212的尺寸，可有效提升光學式編碼器Z的解析度。稍後將詳細敘述上述有關條狀出光面212與光感測模組3中感測元件30的裸露感測區300配合的細節。 Furthermore, as shown in Figure 4, the conventional light guide encoder usually uses The spherical structure S with a spherical center constitutes the light-emitting surface of the blade grid wheel in the encoder, so that light is emitted from the spherical structure S and projected on the sensor. However, because the spherical surface itself has a focusing function, the light beam emitted from the spherical structure S will be focused, so that the light beam has different widths at different positions. However, the difference between the present invention and the spherical structure S used in the conventional light guide encoder is that, as shown in FIG. 5, the aspheric structure A does not have a sphere center but has a main axis. The light beam emitted by the aspheric structure A (for example, a parabolic surface) will be a parallel light beam or a nearly parallel light beam close to parallel light. The embodiment of the present invention uses an aspherical structure A, such as a hyperboloid or a parabolic surface, to form the strip light exit surface 212. In this way, it can be ensured that the light beam leaving the light guide module 2 from the strip light exit surface 212 has a stable width W ; That is, the beam width W of the parallel beam or near-parallel beam L2 is equal to the width W of the strip light exit surface 212. Therefore, the parallel beam or near-parallel beam L2 with a stable width W can be matched with the sensing element or the bare sensing area with a specific width and arrangement to achieve the effect of generating a coded signal with higher resolution. . For example, since the light beam leaving the light guide module 2 of the present invention has a stable width W, by controlling the size and arrangement of the exposed sensing area 300 of the sensing element 30 of the light sensing module 3, and controlling the guide The size of the strip light emitting surface 212 of the optical module 2 can effectively improve the resolution of the optical encoder Z. The details regarding the cooperation between the strip-shaped light-emitting surface 212 and the bare sensing area 300 of the sensing element 30 in the light sensing module 3 will be described in detail later.

更進一步來說，如圖6所示，非球面凸出部21具有環形出光面210，環形出光面210可包括兩個折射面213及連接於兩個折射面213之間的條狀出光面212，折射面213可以是折射平面，而條狀出光面212可以是非球面的出光面，例如雙曲面、拋物面或橢圓面的出光面。 Furthermore, as shown in FIG. 6, the aspherical protrusion 21 has a ring-shaped light-emitting surface 210. The ring-shaped light-emitting surface 210 may include two refractive surfaces 213 and a strip-shaped light-emitting surface 212 connected between the two refractive surfaces 213. The refraction surface 213 may be a refraction plane, and the strip-shaped light-emitting surface 212 may be an aspherical light-emitting surface, such as a hyperboloid, parabolic or elliptical light-emitting surface.

接著，請參考圖7所示，環形出光面210可由依序相連的第一表面a1、第二表面a2、第三表面a3及第四表面a4所構成。第一表面a1及第四表面a4為折射面213，而連接於第一表面a1及第四表面a4之間的第二表面a2及第三表面a3一同構成條狀出光 面212。於本發明中，由於投射於折射面213的折射光束R的入射角等於折射角，折射光束R會經由折射射向導光模組2的內部。如此一來，條狀出光面212(第二表面a2及第三表面a3)為環形出光面210中折射光束R得以穿過的部份，折射光束R穿過條狀出光面212而成為平行光束或***行光束L2。另一方面，若折射光束R射向環形出光面210中的折射面213(第一表面a1或第四表面a4)，折射光束R則無法直接通過導光模組2而射出。值得一提的是，通過條狀出光面212的平行光束或***行光束L2的光束寬度可以等於條狀出光面212的寬度。然而，本發明不以上述所舉的例子為限。 Next, referring to FIG. 7, the ring-shaped light-emitting surface 210 may be composed of a first surface a1, a second surface a2, a third surface a3, and a fourth surface a4 that are sequentially connected. The first surface a1 and the fourth surface a4 are refracting surfaces 213, and the second surface a2 and the third surface a3 connected between the first surface a1 and the fourth surface a4 together form a strip of light. 面212. In the present invention, since the incident angle of the refracted light beam R projected on the refracting surface 213 is equal to the refraction angle, the refracted light beam R will be directed into the light module 2 through refraction. In this way, the strip-shaped light-emitting surface 212 (the second surface a2 and the third surface a3) is the part of the ring-shaped light-emitting surface 210 through which the refracted light beam R passes, and the refracted light beam R passes through the strip-shaped light-emitting surface 212 to become a parallel beam Or nearly parallel beam L2. On the other hand, if the refracted light beam R is directed to the refracting surface 213 (the first surface a1 or the fourth surface a4) of the annular light exit surface 210, the refracted light beam R cannot be directly emitted through the light guide module 2. It is worth mentioning that the beam width of the parallel light beam or nearly parallel light beam L2 passing through the strip light exit surface 212 may be equal to the width of the strip light exit surface 212. However, the present invention is not limited to the above-mentioned examples.

值得一提的是，第一表面a1、第二表面a2、第三表面a3及第四表面a4可具有相同的垂直投影面積。如圖10所示，第一表面a1、第二表面a2、第三表面a3及第四表面a4可具有相同的投影寬度d。在此情況下，構成條狀出光面212的第二表面a2及第三表面a3的投影寬度將佔總投影寬度的二分之一。然而，第一表面a1、第二表面a2、第三表面a3及第四表面a4的配置可依據實際需求加以調整。藉由調整條狀出光面212的曲率，可以調整離開導光模組2的平行光或***行光L2的寬度。換句話說，平行光束或***行光束L2的光束寬度可由非球面凸出部21的頂點曲面的曲率來調整。 It is worth mentioning that the first surface a1, the second surface a2, the third surface a3, and the fourth surface a4 may have the same vertical projection area. As shown in FIG. 10, the first surface a1, the second surface a2, the third surface a3, and the fourth surface a4 may have the same projection width d. In this case, the projection width of the second surface a2 and the third surface a3 forming the strip-shaped light-emitting surface 212 will account for half of the total projection width. However, the configuration of the first surface a1, the second surface a2, the third surface a3, and the fourth surface a4 can be adjusted according to actual requirements. By adjusting the curvature of the strip light emitting surface 212, the width of the parallel light or the near-parallel light L2 leaving the light guide module 2 can be adjusted. In other words, the beam width of the parallel beam or the near-parallel beam L2 can be adjusted by the curvature of the vertex surface of the aspheric protrusion 21.

接著，再請參考圖6，其顯示了折射光束R射向環形出光面210的一種可能的出光路徑。折射光束R射向折射面213(對應於圖10所示的第一表面a1)而被折射，接著射向條狀出光面212(對應於圖10所示的第二表面a2及第三表面a3)，並穿過條狀出光面212而成為平行光束或***行光束L2射出。也就是說，發光模組1所產生的入射光束L1從導光模組2的條狀入光面211進入導光本體20中，並通過環形出光面210的條狀入光面211，以形成投射(也就是說“正面對焦”)在光感測模組3上的平行光束或接 ***行光的***行光束L2。 Next, please refer to FIG. 6 again, which shows a possible light exit path of the refracted light beam R toward the annular light exit surface 210. The refracted light beam R hits the refraction surface 213 (corresponding to the first surface a1 shown in FIG. 10) to be refracted, and then hits the strip-shaped light emitting surface 212 (corresponding to the second surface a2 and the third surface a3 shown in FIG. 10). ), and pass through the strip-shaped light-emitting surface 212 to become a parallel beam or a nearly parallel beam L2 and exit. That is, the incident light beam L1 generated by the light-emitting module 1 enters the light guide body 20 from the strip-shaped light-incident surface 211 of the light guide module 2, and passes through the strip-shaped light-incident surface 211 of the annular light-emitting surface 210 to form Projected (that is, "front focus") on the parallel beam or interface of the light sensing module 3 Near-parallel light beam L2.

更進一步來說，如圖2所示，本發明的光學式編碼器Z還進一步包含一光柵4，光柵4設置於導光模組2及光感測模組3之間，光柵4包含多個分別用於裸露多個裸露感測區300的開口(如圖9所示，第一開口41、第二開口42)，且光柵4可為一選擇性構件。舉例來說，當光學式編碼器Z包含光柵4時，光柵4可設置於導光模組2及光感測模組3之間，且包含多個狹縫狀的開口(如圖9所示)。此時，光感測模組3可由長條狀的多個感測元件30所構成，且狹縫狀的開口40可用於裸露感測元件30的特定區域，使光感測模組3具有多個裸露感測區300。 Furthermore, as shown in FIG. 2, the optical encoder Z of the present invention further includes a grating 4, which is disposed between the light guide module 2 and the light sensing module 3, and the grating 4 includes a plurality of The openings respectively used to expose a plurality of bare sensing regions 300 (as shown in FIG. 9, the first opening 41 and the second opening 42), and the grating 4 can be an optional component. For example, when the optical encoder Z includes a grating 4, the grating 4 can be disposed between the light guide module 2 and the light sensing module 3, and includes a plurality of slit-shaped openings (as shown in FIG. 9 ). At this time, the light sensing module 3 may be composed of a plurality of elongated sensing elements 30, and the slit-shaped opening 40 may be used to expose a specific area of the sensing element 30, so that the light sensing module 3 has more A bare sensing area 300.

藉由上述設計，本發明實施例的折射光束R可通過導光模組2的結構設計，以被相對應的環形出光面210的其餘部分(折射面213)所折射，或是穿過相對應的環形出光面210的一部分(條狀出光面212)而成為平行光束或***行光束L2，並通過光柵4而投向於光感測模組3，進而產生具有高解析度的電路編碼信號。 With the above design, the refracted light beam R in the embodiment of the present invention can pass through the structural design of the light guide module 2 to be refracted by the remaining part of the corresponding annular light-emitting surface 210 (refracting surface 213), or pass through the corresponding A part of the ring-shaped light-emitting surface 210 (striped light-emitting surface 212) becomes a parallel beam or a nearly parallel beam L2, and is projected to the light sensing module 3 through the grating 4, thereby generating a high-resolution circuit coded signal.

另外，如圖8所示，本發明的光學式編碼器Z還可進一步包括反射鏡5。反射鏡5設置於導光模組2的一側，用以將來自導光模組2的平行光束或***行光束L2反射而通過光柵4，再射向光感測模組3。換句話說，光感測模組3可透過反射鏡5的反射來接收由條狀出光面212所射出的平行光束或***行光束L2。 In addition, as shown in FIG. 8, the optical encoder Z of the present invention may further include a mirror 5. The reflecting mirror 5 is arranged on one side of the light guide module 2 to reflect the parallel light beam or the nearly parallel light beam L2 from the light guide module 2 to pass through the grating 4 and then to the light sensing module 3. In other words, the light sensing module 3 can receive the parallel light beam or the nearly parallel light beam L2 emitted from the strip-shaped light exit surface 212 through the reflection of the reflector 5.

綜合上述，本發明還可進一步提供一種光學式編碼器Z，其包含：一發光模組1、一導光模組2以及一光感測模組3。導光模組2鄰近發光模組1，導光模組2包括一導光本體20及一非球面凸出部21。光感測模組3鄰近導光模組2。其中，發光模組1所產生的入射光束L通過導光模組2，以形成投射在光感測模組3上的一平行光束或一接***行光的***行光束L2。其中，平行光束或***行光束L2的光束寬度由非球面凸出部21的頂點曲面的曲率來調整。 Based on the above, the present invention can further provide an optical encoder Z, which includes: a light emitting module 1, a light guide module 2 and a light sensing module 3. The light guide module 2 is adjacent to the light emitting module 1, and the light guide module 2 includes a light guide body 20 and an aspherical protrusion 21. The light sensing module 3 is adjacent to the light guide module 2. The incident light beam L generated by the light-emitting module 1 passes through the light guide module 2 to form a parallel light beam or a nearly parallel light beam L2 projected on the light sensing module 3. Among them, the beam width of the parallel beam or the nearly parallel beam L2 is adjusted by the curvature of the vertex curved surface of the aspheric protrusion 21.

值得注意的是，為達到提升光學式編碼器Z的解析度的技術效果，必須控制前述多個感測元件30以及感測元件30的裸露感測區300的寬度，使其與導光模組2的非球面凸出部21的寬度以及其中條狀出光面212的寬度相互配合。如此一來，本發明的光學式編碼器Z得以僅利用單一個非球面凸出部21而使光感測模組3產生一個完整的編碼序列(例如，透過非球面凸出部21而產生[0,0]、[0,1]、[1,0]及[1,1]的訊號)。上述控制的詳細手段及參數將於後續實施態樣中詳細說明。 It is worth noting that, in order to achieve the technical effect of improving the resolution of the optical encoder Z, the aforementioned plurality of sensing elements 30 and the width of the exposed sensing area 300 of the sensing element 30 must be controlled so as to be compatible with the light guide module The width of the aspherical protrusion 21 of 2 and the width of the strip-shaped light-emitting surface 212 are matched with each other. In this way, the optical encoder Z of the present invention can only use a single aspheric protrusion 21 to enable the light sensing module 3 to generate a complete code sequence (for example, through the aspheric protrusion 21 [ 0,0], [0,1], [1,0] and [1,1] signals). The detailed methods and parameters of the above control will be described in detail in the subsequent implementation aspects.

此外，上述所舉的例子只是其中一可行的實施例而並非用以限定本發明。 In addition, the above-mentioned example is only one of the feasible embodiments and is not intended to limit the present invention.

[第二實施例] [Second Embodiment]

請參閱圖9至圖13，圖9至圖12分別為本發明第二實施例所提供的光學式編碼器Z的平行光束或***行光束L2與光感測模組3之間相互關係的第一局部示意圖至第四局部示意圖，而圖13為此實施例中光感測模組接3收光束後產生訊號的示意圖。並請一併參閱圖1至圖8。 Please refer to Figures 9 to 13, Figures 9 to 12 are respectively the first embodiment of the relationship between the parallel beam or near-parallel beam L2 of the optical encoder Z provided by the second embodiment of the present invention and the optical sensing module 3 A partial schematic diagram to a fourth partial schematic diagram, and FIG. 13 is a schematic diagram of a signal generated by the light sensing module after receiving 3 light beams in this embodiment. Please also refer to Figure 1 to Figure 8.

具體來說，如圖9所示，光感測模組3包含長條狀的第一感測元件31及第二感測元件32，兩個感測元件31、32具有相同的寬度D1，且其兩端各自相互對齊，使得光感測模組3同樣具有寬度D1。光感測模組3與導光模組2之間進一步設置寬度大於D1的光柵4，用於遮蔽第一感測元件31及第二感測元件32的特定區域並裸露出其他未被遮蔽的區域。光柵4所包含的第一開口41及第二開口42分別裸露出第一感測元件31的第一裸露感測區310以及第二感測元件32的第二裸露感測區320。在本實施例中，第一開口41及第二開口42具有1/4D1的寬度，因此，由其等所裸露的第一裸露感測區310及第二裸露感測區320同樣具有1/4D1的寬度。第一裸露感測區310及第二裸露感測區320彼此橫向錯 位，且分別横向沿著互相平行的兩個不同水平線H1、H2延伸設置。 Specifically, as shown in FIG. 9, the light sensing module 3 includes an elongated first sensing element 31 and a second sensing element 32, and the two sensing elements 31, 32 have the same width D1, and Its two ends are aligned with each other, so that the light sensing module 3 also has a width D1. A grating 4 with a width greater than D1 is further arranged between the light sensing module 3 and the light guide module 2 for shielding specific areas of the first sensing element 31 and the second sensing element 32 and exposing other unshielded areas area. The first opening 41 and the second opening 42 included in the grating 4 respectively expose the first bare sensing area 310 of the first sensing element 31 and the second bare sensing area 320 of the second sensing element 32. In this embodiment, the first opening 41 and the second opening 42 have a width of 1/4D1. Therefore, the first exposed sensing area 310 and the second exposed sensing area 320 exposed by them also have a width of 1/4D1. The width. The first bare sensing area 310 and the second bare sensing area 320 are laterally offset from each other. Bit, and respectively extend laterally along two different horizontal lines H1, H2 parallel to each other.

如圖9所示，第一裸露感測區31及第二裸露感測區32分別被區分成多個編碼區310a、310b、320a、320b，而平行光束或***行光束L2的寬度W1是小於或等於編碼區的寬度。也就是說，每一個感測元件的裸露感測區被區分成多個編碼區，平行光束或***行光束L2的光束寬度會小於或等於每一個編碼區的寬度。 As shown in FIG. 9, the first bare sensing area 31 and the second bare sensing area 32 are respectively divided into a plurality of coded areas 310a, 310b, 320a, 320b, and the width W1 of the parallel beam or the nearly parallel beam L2 is less than Or equal to the width of the coding area. That is, the bare sensing area of each sensing element is divided into a plurality of code areas, and the beam width of the parallel beam or the nearly parallel beam L2 will be less than or equal to the width of each code area.

換句話說，在本實施例中，由條狀出光面212射出的平行光束或***行光束L2的寬度W1是小於或等於由第一感測元件31及第二感測元件32所構成的光感測模組3的寬度D1的四分之一，即，W1≦1/4D1。其中，在圖9至圖12中是以W1≦1/4D1的比例繪製，但不以此為限。另外，本實施例中的第一裸露感測區310及第二裸露感測區320的寬度為平行光束或***行光束L2的寬度W1的兩倍，即，第一裸露感測區310及第二裸露感測區320分別具有1/2D1的寬度。並且，第一裸露感測區310及第二裸露感測區320是彼此錯位，即，第一裸露感測區310及第二裸露感測區320在不同水平線H1、H2的方向彼此錯位1/4D1的寬度，但不以此為限。接下來，請依序參考圖9至圖12，將針對平行光束或***行光束L2與光感測模組3在不同相對位置時產生訊號的詳細方式進行說明。 In other words, in this embodiment, the width W1 of the parallel beam or near-parallel beam L2 emitted from the strip-shaped light-emitting surface 212 is less than or equal to the light formed by the first sensing element 31 and the second sensing element 32. A quarter of the width D1 of the sensing module 3, that is, W1≦1/4D1. Wherein, in FIG. 9 to FIG. 12, it is drawn with a ratio of W1≦1/4D1, but it is not limited thereto. In addition, the width of the first bare sensing area 310 and the second bare sensing area 320 in this embodiment is twice the width W1 of the parallel beam or near-parallel beam L2, that is, the first bare sensing area 310 and the second bare sensing area 310 The two bare sensing regions 320 respectively have a width of 1/2D1. In addition, the first exposed sensing area 310 and the second exposed sensing area 320 are misaligned with each other, that is, the first exposed sensing area 310 and the second exposed sensing area 320 are misaligned with each other in the directions of different horizontal lines H1, H2. The width of 4D1, but not limited to this. Next, please refer to FIGS. 9 to 12 in order to describe the detailed method of generating signals when the parallel beam or the nearly parallel beam L2 and the light sensing module 3 are at different relative positions.

首先，如圖9所示，第一光裸露感測區310或是第二光裸露感測區320皆未對應到平行光束或***行光束L2，即第一光裸露感測區310或是第二光裸露感測區320皆未對應到條狀出光面212的第二表面a2及第三表面a3，因此，配合圖13所示，在位置(1)時，光感測模組3不會接收到光束訊號，而產生[0,0]的訊號。 First, as shown in FIG. 9, neither the first light exposure sensing area 310 nor the second light exposure sensing area 320 corresponds to the parallel or nearly parallel light beam L2, that is, the first light exposure sensing area 310 or the second light exposure sensing area 310 The two-light exposed sensing area 320 does not correspond to the second surface a2 and the third surface a3 of the strip-shaped light-emitting surface 212. Therefore, as shown in FIG. 13, in the position (1), the light sensing module 3 does not Upon receiving the beam signal, a signal of [0,0] is generated.

接著，如圖10所示，第一光裸露感測區31是對應於導光模組2中作為折射面213的第一表面a1，因此，光感測模組3不會接收到光束訊號。另外，由條狀出光面212的第二表面a2及第三 表面a3射出的平行光束或***行光束L2射向光感測模組3，並投射於由第二開口42裸露的第二光裸露感測區320的一部分(即其中一編碼區)。因此，配合圖13所示，在位置(2)時，光感測模組3產生[0,1]的訊號。 Next, as shown in FIG. 10, the first light-exposure sensing area 31 corresponds to the first surface a1 of the light guide module 2 as the refractive surface 213, and therefore, the light sensing module 3 does not receive the light beam signal. In addition, the second surface a2 and the third surface of the strip-shaped light-emitting surface 212 The parallel light beam or nearly parallel light beam L2 emitted from the surface a3 is directed toward the light sensing module 3 and is projected on a part of the second light naked sensing area 320 exposed by the second opening 42 (ie, one of the coded areas). Therefore, as shown in FIG. 13, at the position (2), the light sensing module 3 generates a signal of [0,1].

接下來，如圖11所示，穿過條狀出光面212的第二表面a2及第三表面a3而射出的平行光束或***行光束L2射向光感測模組3，並投射於由第一開口41裸露的第一光裸露感測區310的一部分(即其中一編碼區)以及第二開口42裸露的第二光裸露感測區320的另一部分(即其中一編碼區)。因此配合圖13所示，在位置(3)時，光感測模組3產生[1,1]的訊號。 Next, as shown in FIG. 11, the parallel light beam or nearly parallel light beam L2 emitted through the second surface a2 and the third surface a3 of the strip-shaped light-emitting surface 212 is directed toward the light sensing module 3, and is projected on the second surface a2 and the third surface a3. A part of the first light exposure sensing area 310 exposed by an opening 41 (ie, one of the encoding areas) and another part of the second light exposure sensing area 320 exposed by the second opening 42 (ie, one of the encoding areas). Therefore, as shown in FIG. 13, at the position (3), the light sensing module 3 generates a signal of [1,1].

最後，如圖12所示，穿過條狀出光面212的第二表面a2及第三表面a3而射出的平行光束或***行光束L2射向光感測模組3，並投射於由第一開口41裸露的第一光裸露感測區310的另一部分(即其中一編碼區)。此時，第二光裸露感測區320是對應於導光模組2中作為折射面213的第四表面a4，因此不會接收到光束訊號。故，配合圖13所示，在位置(4)時，光感測模組3產生[1,0]的訊號。 Finally, as shown in FIG. 12, the parallel or near-parallel light beam L2 emitted through the second surface a2 and the third surface a3 of the strip-shaped light-emitting surface 212 is directed toward the light sensing module 3, and is projected on the first surface. The other part of the first light-naked sensing area 310 exposed by the opening 41 (that is, one of the coded areas). At this time, the second light exposure sensing area 320 corresponds to the fourth surface a4 as the refraction surface 213 in the light guide module 2 and therefore does not receive the light beam signal. Therefore, as shown in FIG. 13, at the position (4), the optical sensing module 3 generates a signal of [1,0].

如上所述，本發明所提供的光學式編碼器Z通過導光模組2的折射面213及條狀出光面212的設計，並配合光感測模組3中第一裸露感測區310及第二裸露感測區320，可同時產生22=4個感測信號。具體來說，藉由調整平行光束或***行光束L2的寬度W1為小於或等於由第一感測元件31及第二感測元件32所構成的光感測模組3的寬度D1(同時為非球面凸出部21的寬度)的四分之一(W1≦1/4D1)，可增加光學式編碼器Z的解析度。 As described above, the optical encoder Z provided by the present invention adopts the design of the refraction surface 213 and the strip-shaped light-emitting surface 212 of the light guide module 2, and cooperates with the first exposed sensing area 310 and the light sensing module 3 in the light sensing module 3. The second bare sensing area 320 can generate 2 2 =4 sensing signals at the same time. Specifically, by adjusting the width W1 of the parallel beam or near-parallel beam L2 to be less than or equal to the width D1 of the light sensing module 3 composed of the first sensing element 31 and the second sensing element 32 (also A quarter (W1≦1/4D1) of the width of the aspheric protrusion 21) can increase the resolution of the optical encoder Z.

然而，上述所舉的例子只是其中一可行的實施例而並非用以限定本發明。 However, the above-mentioned example is only one of the feasible embodiments and is not intended to limit the present invention.

[第三實施例] [Third Embodiment]

請參閱圖14及圖15，圖14為本發明第三實施例所提供的光學式編碼器Z的平行光束或***行光束L2與光感測模組3之間相互關係的局部示意圖，圖15為圖14所使用的光感測模組3接收光束後產生訊號的示意圖。並請一併參閱圖1至圖13。 Please refer to FIGS. 14 and 15. FIG. 14 is a partial schematic diagram of the relationship between the parallel beam or near-parallel beam L2 of the optical encoder Z and the light sensing module 3 according to the third embodiment of the present invention. FIG. 15 It is a schematic diagram of a signal generated by the light sensing module 3 used in FIG. 14 after receiving a light beam. Please also refer to Figure 1 to Figure 13.

與前述實施例不同的是，在此實施例中，光感測模組3是由第一感測元件31、第二感測元件32、第三感測元件33及第四感測元件34所構成，且其等具有相同的寬度D2。透過光柵4的第一開口41、第二開口42、第三開口43及第四開口44，可分別裸露出相互錯位的第一裸露感測區310、第二裸露感測區320、第三裸露感測區330及第四裸露感測區340。第一裸露感測區310、第二裸露感測區320、第三裸露感測區330及第四裸露感測區340被區分成多個編碼區(其原理與前述實施例相同，在此不再特別說明)，而平行光束或***行光束L2的寬度W2是小於或等於編碼區的寬度。如圖14所示，上述各裸露感測區310、320、330、340分別包含四個寬度為1/8D2的編碼區。 The difference from the previous embodiment is that in this embodiment, the light sensing module 3 is composed of a first sensing element 31, a second sensing element 32, a third sensing element 33, and a fourth sensing element 34. Structure, and they have the same width D2. Through the first opening 41, the second opening 42, the third opening 43, and the fourth opening 44 of the grating 4, the first exposed sensing area 310, the second exposed sensing area 320, and the third exposed area that are misaligned with each other can be exposed. The sensing area 330 and the fourth bare sensing area 340. The first naked sensing area 310, the second naked sensing area 320, the third naked sensing area 330, and the fourth naked sensing area 340 are divided into a plurality of coding areas (the principle is the same as that of the previous embodiment, and it is not here. In particular), the width W2 of the parallel beam or the nearly parallel beam L2 is less than or equal to the width of the code area. As shown in FIG. 14, each of the above-mentioned bare sensing regions 310, 320, 330, 340 respectively includes four coding regions with a width of 1/8D2.

換句話說，在本實施例中，第一裸露感測區310、第二裸露感測區320、第三裸露感測區330及第四裸露感測區340的寬度為1/2D2。另外，第一裸露感測區310、第二裸露感測區320、第三裸露感測區330及第四裸露感測區340在不同水平線H1、H2、H3、H4的方向彼此錯位1/8D2的寬度。 In other words, in this embodiment, the widths of the first naked sensing area 310, the second naked sensing area 320, the third naked sensing area 330, and the fourth naked sensing area 340 are 1/2D2. In addition, the first exposed sensing area 310, the second exposed sensing area 320, the third exposed sensing area 330, and the fourth exposed sensing area 340 are misaligned with each other in the directions of different horizontal lines H1, H2, H3, H4 by 1/8D2 The width.

由條狀出光面212射出的平行光束或***行光束L2的寬度W2是小於或等於光感測模組3的寬度D2的八分之一，即，W2≦1/8D2。圖14是以W2=1/8D2的比例繪示，但不此為限。與前述實施例相同的是，非球面凸出部21的寬度與光感測模組3的寬度D2相同。舉例來說，在圖14所顯示的狀態下，平行光束或***行光束L2投射於光感測模組3並使光感測模組3產生[0,0,0,0]的訊號。在本實施例中，光感測模組3依據與平行光束或***行光束L2在不同的相對位置的情況下而產生的訊號如圖15所示。 因此，在本實施例中，光學式編碼器Z可以產生23=8種信號。 The width W2 of the parallel or near-parallel beam L2 emitted from the strip-shaped light-emitting surface 212 is less than or equal to one-eighth of the width D2 of the light sensing module 3, that is, W2≦1/8D2. Figure 14 is drawn with a ratio of W2=1/8D2, but not limited to this. The same as the previous embodiment, the width of the aspherical protrusion 21 is the same as the width D2 of the light sensing module 3. For example, in the state shown in FIG. 14, the parallel beam or the nearly parallel beam L2 is projected on the light sensing module 3 and the light sensing module 3 generates a signal of [0,0,0,0]. In this embodiment, the signal generated by the light sensing module 3 according to the situation that the parallel beam or the nearly parallel beam L2 is at a different relative position is shown in FIG. 15. Therefore, in this embodiment, the optical encoder Z can generate 2 3 =8 kinds of signals.

然而，上述所舉的例子只是其中一可行的實施例而並非用以限定本發明。 However, the above-mentioned example is only one of the feasible embodiments and is not intended to limit the present invention.

[第四實施例] [Fourth Embodiment]

請參考圖16及圖17，圖16為本發明第四實施例所提供的光學式編碼器Z的平行光束或***行光束L2與光感測模組3之間相互關係的局部示意圖，圖17為圖16所使用的光感測模組3接收光束後產生訊號的示意圖。並請一併參閱圖1至圖15。 Please refer to FIG. 16 and FIG. 17. FIG. 16 is a partial schematic diagram of the relationship between the parallel beam or near-parallel beam L2 of the optical encoder Z and the light sensing module 3 according to the fourth embodiment of the present invention. FIG. 17 It is a schematic diagram of a signal generated by the light sensing module 3 used in FIG. 16 after receiving a light beam. Please also refer to Figure 1 to Figure 15.

如圖16所示，在本實施例中，光學式編碼器Z的光感測模組3包含平行排列且為長條狀的第一感測元件31、第二感測元件32及第三感測元件33，由上述感測元件所構成的光感測模組3的寬度為D3。光柵4的第一開口41a~41d裸露第一感測元件31的特定區域而形成第一裸露感測區310，第二開口42a、42b裸露第二感測元件32的特定區域而形成第二裸露感測區320，且第三開口43裸露第三感測元件33的特定區域而形成第三裸露感測區330。各裸露感測區的尺寸如圖所示。 As shown in FIG. 16, in this embodiment, the light sensing module 3 of the optical encoder Z includes a first sensing element 31, a second sensing element 32, and a third sensing element that are arranged in parallel and are elongated. For the sensing element 33, the width of the light sensing module 3 formed by the above sensing element is D3. The first openings 41a to 41d of the grating 4 expose specific areas of the first sensing element 31 to form a first exposed sensing area 310, and the second openings 42a and 42b expose specific areas of the second sensing element 32 to form a second exposed area. The sensing area 320 and the third opening 43 expose a specific area of the third sensing element 33 to form a third exposed sensing area 330. The size of each bare sensing area is shown in the figure.

具體來說，第一裸露感測區310可被區分成多個編碼區310a~310d，第二裸露感測區320可被區分成多個編碼區320a、320b，第三裸露感測區330也可被區分成多個編碼區(其原理與前述實施例相同，在此不再特別說明)；且，平行光束或***行光束L2的寬度W3是小於或等於編碼區的寬度。如圖16所示，第一裸露感測區310a~310d、第二裸露感測區320a、320b及第三裸露感測區330分別包含四個、兩個及一個的編碼區。第一裸露感測區310a~310d的編碼區寬度為2/8D3，第二裸露感測區320a、320b的編碼區寬度為1/8D3，第三裸露感測區330的編碼區寬度為1/2D3。 Specifically, the first bare sensing area 310 can be divided into a plurality of coding regions 310a to 310d, the second bare sensing region 320 can be divided into a plurality of coding regions 320a, 320b, and the third bare sensing region 330 is also It can be divided into a plurality of coding regions (the principle is the same as the foregoing embodiment, and will not be described in particular here); and the width W3 of the parallel beam or the nearly parallel beam L2 is less than or equal to the width of the coding region. As shown in FIG. 16, the first bare sensing areas 310a to 310d, the second bare sensing areas 320a, 320b, and the third bare sensing area 330 include four, two, and one encoding areas, respectively. The width of the coding region of the first bare sensing region 310a~310d is 2/8D3, the width of the coding region of the second bare sensing region 320a, 320b is 1/8D3, and the width of the coding region of the third bare sensing region 330 is 1/ 2D3.

在本實施例中，平行光束或***行光束L3的寬度W3是小於 或等於光感測模組3的寬度D3的八分之一，即，W3≦1/8D3。如同前述的實施例，非球面凸出部21的寬度等於光感測模組3的寬度D3。舉例來說，如圖16所示，平行光束或***行光束L2投射於光感測模組3並使光感測模組3產生[0,0,0]的訊號。在本實施例中，光感測模組3依據與平行光束或***行光束L3在不同的相對位置的情況下而產生的訊號如圖17所示。在本實施例中，光學式編碼器Z可以產生23=8種信號。 In this embodiment, the width W3 of the parallel beam or the nearly parallel beam L3 is less than or equal to one-eighth of the width D3 of the light sensing module 3, that is, W3≦1/8D3. As in the aforementioned embodiment, the width of the aspherical protrusion 21 is equal to the width D3 of the light sensing module 3. For example, as shown in FIG. 16, a parallel beam or a nearly parallel beam L2 is projected on the light sensing module 3 and the light sensing module 3 generates a signal of [0,0,0]. In this embodiment, the signal generated by the light sensing module 3 according to the conditions of the parallel beam or the nearly parallel beam L3 at a different relative position is shown in FIG. 17. In this embodiment, the optical encoder Z can generate 2 3 =8 kinds of signals.

然而，上述所舉的例子只是其中一可行的實施例而並非用以限定本發明。 However, the above-mentioned example is only one of the feasible embodiments and is not intended to limit the present invention.

[實施例的有益效果] [Beneficial effects of the embodiment]

本發明的其中一有益效果在於，本發明所提供的光學式編碼器Z，其能通過“一導光模組2，所述導光模組2鄰近所述發光模組1”以及“一光感測模組3，所述光感測模組包含多個鄰近所述導光模組2的感測元件30，其中每一所述感測元件30具有一裸露感測區300，多個所述感測元件30的多個裸露感測區300彼此橫向錯位且分別横向沿著多個互相平行的不同水平線H1、H2延伸設置”的技術方案，以使投射在光感測模組3上的平行光束或***行光束L2與多個感測元件30的裸露感測區300相互配合，進而提高編碼器的解析能力；並且，本發明所提供的光學式編碼器Z也可避免光之繞射現象的產生。 One of the beneficial effects of the present invention is that the optical encoder Z provided by the present invention can pass through "a light guide module 2, which is adjacent to the light emitting module 1" and "a light The sensing module 3, the light sensing module includes a plurality of sensing elements 30 adjacent to the light guide module 2, wherein each of the sensing elements 30 has an exposed sensing area 300, a plurality of The multiple exposed sensing regions 300 of the sensing element 30 are laterally displaced from each other and extend laterally along a plurality of different horizontal lines H1, H2 that are parallel to each other, so that the projected area on the light sensing module 3 The parallel beam or nearly parallel beam L2 cooperates with the exposed sensing area 300 of the plurality of sensing elements 30, thereby improving the resolution capability of the encoder; and the optical encoder Z provided by the present invention can also avoid light diffraction The occurrence of the phenomenon.

本發明的另外一有益效果在於，本發明所提供的光學式編碼器Z，其能通過“一導光模組2，所述導光模組2鄰近所述發光模組1，所述導光模組2包括一導光本體20及一非球面凸出部21”、“所述發光模組1所產生的入射光束L1通過所述導光模組2，以形成投射在所述光感測模組3上的一平行光束或一接***行光的***行光束L2”以及“所述平行光束或所述***行光束L2的光束寬度由所述非球面凸出部21的頂點曲面的曲率來調整”的技術 方案，以使投射在光感測模組3上的平行光束或***行光束L2與多個感測元件30的裸露感測區300相互配合，進而提高編碼器的解析能力；並且，本發明所提供的光學式編碼器Z也可避免光之繞射現象的產生。 Another beneficial effect of the present invention is that the optical encoder Z provided by the present invention can pass through "a light guide module 2, which is adjacent to the light emitting module 1, and the light guide module The module 2 includes a light guide body 20 and an aspherical projection 21", "the incident light beam L1 generated by the light emitting module 1 passes through the light guide module 2 to form a projection on the light sensor A parallel beam or a near-parallel beam L2 on the module 3" and "the beam width of the parallel beam or the near-parallel beam L2 is determined by the curvature of the apex surface of the aspheric protrusion 21 Technology of adjustment The solution is to make the parallel light beam or nearly parallel light beam L2 projected on the light sensing module 3 cooperate with the exposed sensing area 300 of the plurality of sensing elements 30 to improve the resolution capability of the encoder; and, the present invention The provided optical encoder Z can also avoid the phenomenon of light diffraction.

更進一步來說，本發明的光學式編碼器Z通過上述的技術方案，以在不使用複雜結構的條件下改進及提升導光式編碼器的解析度。 Furthermore, the optical encoder Z of the present invention adopts the above technical solution to improve and enhance the resolution of the light guide encoder without using a complicated structure.

以上所公開的內容僅為本發明的優選可行實施例，並非因此侷限本發明的申請專利範圍，所以凡是運用本發明說明書及圖式內容所做的等效技術變化，均包含於本發明的申請專利範圍內。 The content disclosed above is only a preferred and feasible embodiment of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

Z‧‧‧光學式編碼器 Z‧‧‧Optical encoder

1‧‧‧發光模組 1‧‧‧Lighting Module

2‧‧‧導光模組 2‧‧‧Light Guide Module

3‧‧‧光感測模組 3‧‧‧Light sensing module

L‧‧‧光束 L‧‧‧Beam

Claims (8)

一種光學式編碼器，其包含：一發光模組；一導光模組，所述導光模組鄰近所述發光模組；以及一光感測模組，所述光感測模組包含多個鄰近所述導光模組的感測元件，其中每一所述感測元件具有一裸露感測區，多個所述感測元件的多個裸露感測區彼此橫向錯位且分別横向沿著多個互相平行的不同水平線延伸設置；其中，所述導光模組包括一導光本體以及連接於所述導光本體的一非球面凸出部，所述導光本體呈長條形，所述導光本體的一端具有面向發光模組的一條狀入光面，所述導光本體的另一端的所述非球面凸出部具有對應於所述光感測模組的一條狀出光面；其中，所述發光模組所產生的入射光束通過所述導光本體與所述非球面凸出部，並通過在所述導光本體的內部進行多次的折射，以形成投射在所述光感測模組上的一平行光束或一接***行光的***行光束。 An optical encoder, comprising: a light-emitting module; a light-guiding module adjacent to the light-emitting module; and a light-sensing module, the light-sensing module includes a plurality of Sensing elements adjacent to the light guide module, wherein each of the sensing elements has an exposed sensing area, and a plurality of exposed sensing areas of the plurality of sensing elements are laterally displaced from each other and are respectively laterally along A plurality of different horizontal lines parallel to each other extend; wherein, the light guide module includes a light guide body and an aspheric protrusion connected to the light guide body, the light guide body is elongated, so One end of the light guide body has a strip light incident surface facing the light emitting module, and the aspherical protrusion on the other end of the light guide body has a strip light exit surface corresponding to the light sensing module; Wherein, the incident light beam generated by the light-emitting module passes through the light guide body and the aspherical convex portion, and is refracted multiple times inside the light guide body to form the light projected on the light A parallel beam or a near-parallel beam close to parallel light on the sensing module. 如請求項1所述的光學式編碼器，更進一步包含：一光柵，所述光柵設置於所述導光模組及所述光感測模組之間，所述光柵包含多個分別用於裸露多個所述裸露感測區的開口。 The optical encoder according to claim 1, further comprising: a grating arranged between the light guide module and the light sensing module, and the grating includes a plurality of A plurality of openings of the bare sensing area are exposed. 如請求項2所述的光學式編碼器，其中，每一所述感測元件的所述裸露感測區被區分成多個編碼區，所述平行光束或所述***行光束的光束寬度會小於或等於每一所述編碼區的寬度。 The optical encoder according to claim 2, wherein the bare sensing area of each sensing element is divided into a plurality of encoding areas, and the beam width of the parallel light beam or the near-parallel light beam is It is less than or equal to the width of each of the coding regions. 如請求項2所述的光學式編碼器，其中，所述發光模組包括至少一發光源以及一包覆所述發光源的透光本體，所述透光本體具有一弧形出光面。 The optical encoder according to claim 2, wherein the light-emitting module includes at least one light-emitting source and a light-transmitting body covering the light-emitting source, and the light-transmitting body has an arc-shaped light-emitting surface. 如請求項4所述的光學式編碼器，其中，所述條狀入光面面向所述弧形出光面。 The optical encoder according to claim 4, wherein the strip-shaped light-incident surface faces the arc-shaped light-emitting surface. 如請求項5所述的光學式編碼器，其中，所述平行光束或所述***行光束的光束寬度等於所述條狀出光面的寬度。 The optical encoder according to claim 5, wherein the beam width of the parallel beam or the near-parallel beam is equal to the width of the strip-shaped light-emitting surface. 一種光學式編碼器，其包含：一發光模組；一導光模組，所述導光模組鄰近所述發光模組，所述導光模組包括一導光本體及一非球面凸出部；以及一光感測模組，所述光感測模組鄰近所述導光模組；其中，所述非球面凸出部連接於所述導光本體，所述導光本體呈長條形，所述導光本體的一端具有面向發光模組的一條狀入光面，所述導光本體的另一端的所述非球面凸出部具有對應於所述光感測模組的一條狀出光面；其中，所述發光模組所產生的入射光束通過所述導光本體與所述非球面凸出部，並通過在所述導光本體的內部進行多次的折射，以形成投射在所述光感測模組上的一平行光束或一接***行光的***行光束；其中，所述平行光束或所述***行光束的光束寬度由所述非球面凸出部的頂點曲面的曲率來調整。 An optical encoder, comprising: a light-emitting module; a light-guiding module, the light-guiding module is adjacent to the light-emitting module, and the light-guiding module includes a light-guiding body and an aspheric protrusion Part; and a light sensing module, the light sensing module is adjacent to the light guide module; wherein, the aspherical protrusion is connected to the light guide body, the light guide body is elongated One end of the light guide body has a strip light incident surface facing the light-emitting module, and the aspherical protrusion on the other end of the light guide body has a strip shape corresponding to the light sensing module Light-emitting surface; wherein the incident light beam generated by the light-emitting module passes through the light guide body and the aspherical protrusion, and is refracted multiple times in the light guide body to form a projection A parallel light beam or a near parallel light beam close to parallel light on the light sensing module; wherein the beam width of the parallel light beam or the near parallel light beam is determined by the curvature of the vertex surface of the aspheric protrusion To adjust. 如請求項7所述的光學式編碼器，其中，所述發光模組包括至少一發光源以及一包覆所述發光源的透光本體，所述透光本體具有一弧形出光面；其中，所述條狀入光面面向所述弧形出光面。 The optical encoder according to claim 7, wherein the light-emitting module includes at least one light-emitting source and a light-transmitting body covering the light-emitting source, the light-transmitting body having an arc-shaped light-emitting surface; wherein , The strip-shaped light-incident surface faces the arc-shaped light-emitting surface.
TW108107842A 2019-03-08 2019-03-08 Optical encoder TWI704330B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW108107842A TWI704330B (en) 2019-03-08 2019-03-08 Optical encoder
CN202010097510.0A CN111664878B (en) 2019-03-08 2020-02-17 Optical encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW108107842A TWI704330B (en) 2019-03-08 2019-03-08 Optical encoder

Publications (2)

Publication Number Publication Date
TWI704330B true TWI704330B (en) 2020-09-11
TW202033934A TW202033934A (en) 2020-09-16

Family

ID=72382543

Family Applications (1)

Application Number Title Priority Date Filing Date
TW108107842A TWI704330B (en) 2019-03-08 2019-03-08 Optical encoder

Country Status (2)

Country Link
CN (1) CN111664878B (en)
TW (1) TWI704330B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1282416A (en) * 1997-10-20 2001-01-31 帕特辛·豪 Optical encoder with at least one lenticular sheet
CN1601232A (en) * 2003-09-27 2005-03-30 光栅科技有限公司 Light source for optical encoder
TW201736804A (en) * 2016-04-15 2017-10-16 曾信得 Scanning light-guiding encoder by forward focusing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004191087A (en) * 2002-12-09 2004-07-08 Nidec Copal Corp Optical encoder
JP6340598B2 (en) * 2013-11-29 2018-06-13 パナソニックＩｐマネジメント株式会社 Light guide member
TWI585372B (en) * 2016-02-05 2017-06-01 曾信得 Optical scanning light-guiding encoder
CN108571992B (en) * 2017-03-09 2020-04-21 曾吉旺 Optical scanning type double-layer light guide encoder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1282416A (en) * 1997-10-20 2001-01-31 帕特辛·豪 Optical encoder with at least one lenticular sheet
CN1601232A (en) * 2003-09-27 2005-03-30 光栅科技有限公司 Light source for optical encoder
TW201736804A (en) * 2016-04-15 2017-10-16 曾信得 Scanning light-guiding encoder by forward focusing

Also Published As

Publication number Publication date
TW202033934A (en) 2020-09-16
CN111664878A (en) 2020-09-15
CN111664878B (en) 2022-06-10

Similar Documents

Publication Publication Date Title
CN107402644B (en) Forward focusing scanning type light guide encoder
TWI585372B (en) Optical scanning light-guiding encoder
CN108474534A (en) The lighting unit for generating the light beam with terminator for automotive headlight
US11592726B2 (en) Lighting device comprising LED and grating
EP3848626B1 (en) Front-lighting system for vehicle headlamp
CN103867969A (en) Surveillance device
WO2005050141A1 (en) Optical encoder
TWI704330B (en) Optical encoder
CN103712095A (en) lighting device
JP6740094B2 (en) Lighting equipment
KR101305728B1 (en) Free―form lens with the effect of overlapping illumination patterns formed by different surfaces of the lens in order to improve the manufacturing tolerance of a led luminaire
CN108571992B (en) Optical scanning type double-layer light guide encoder
JPWO2017204217A1 (en) Lighting device
EP3577389B1 (en) A dielectric collimator with a rejecting center lens
TWI651938B (en) Optical scanning double-layer light-guiding encoder
JP2018128413A (en) Optical scanning light guide encoder
JP2000307807A (en) Linear light source unit
US20140063845A1 (en) Light-guiding plate and plane illumination apparatus therewith
JP7341319B2 (en) Lighting equipment and image scanner
WO2018207765A1 (en) Optical element and optical system device
TW201901191A (en) Optical element and optical system device