TWI829200B - Optical apparatus - Google Patents

Optical apparatus Download PDF

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TWI829200B
TWI829200B TW111122647A TW111122647A TWI829200B TW I829200 B TWI829200 B TW I829200B TW 111122647 A TW111122647 A TW 111122647A TW 111122647 A TW111122647 A TW 111122647A TW I829200 B TWI829200 B TW I829200B
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lens
light
unit
deflection
emitted
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TW202401089A (en
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孫嘉澤
黃永孝
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大陸商信泰光學（深圳）有限公司
亞洲光學股份有限公司
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Abstract

An optical apparatus includes a light source, a reflective unit, a deflection unit, a lens module, and an optical receiver. The light source emits an emitted light. The reflective unit includes a light passing unit. The lens module is with negative refractive power. The emitted light passes through the light passing unit and is directed to the deflection unit. The deflection unit reflects the emitted light to the lens module, and the emitted light passes through the lens module and then shoots an object. A reflected light from the object is incident on the lens module, the reflected light passes through the lens module and is directed to the deflection unit, the deflection unit reflects the reflected light to the reflective unit, and the reflective unit reflects the reflected light to the optical receiver.

Description

光學裝置(八) Optical device(8)

本發明係有關於一種光學裝置，特別是有關於一種適用於光學雷達(LiDAR)的光學裝置。 The present invention relates to an optical device, and in particular to an optical device suitable for optical radar (LiDAR).

現今車載光學雷達之發展趨勢，除了不斷朝向小型化、低成本發展外，為了因應車輛的快速移動，還需具備高速掃描特性，習知的光學雷達已經無法滿足現今車用市場的需求，需要有另一種新架構的光學裝置，才能同時滿足小型化、低成本及高速掃描的車載光學雷達需求。 Today's development trend of vehicle-mounted optical radars is not only towards miniaturization and low-cost development, but also needs to have high-speed scanning characteristics in order to cope with the rapid movement of vehicles. The conventional optical radars can no longer meet the needs of today's automotive market and need to have Another new architecture optical device can simultaneously meet the needs of miniaturization, low cost and high-speed scanning for vehicle-mounted optical radar.

有鑑於此，本發明之主要目的在於提供一種光學裝置，其體積較小、成本較低及掃描速度較快，適用於車載光學雷達。 In view of this, the main purpose of the present invention is to provide an optical device that is smaller in size, lower in cost and faster in scanning speed, and is suitable for vehicle-mounted optical radar.

本發明提供一種光學裝置包括一光源、一反射單元、一偏轉單元、一鏡頭模組及一光接收器。該光源發出一發射光。該反射單元包括一光通過單元。該鏡頭模組具有負屈光力。該發射光穿透該光通過單元射向該偏轉單元，該偏轉單元反射該發射光射向該鏡頭模組，該發射光穿透該鏡頭模組後射向一物體。該物體反射該發射光，使得來自該物體之一反射光先入射該鏡頭模組，該反射光穿透該鏡頭模組射向該偏轉單元，該偏轉單元反射該反射光射向該反射單元，該反射單元反射該反射光射向該 光接收器。 The invention provides an optical device including a light source, a reflection unit, a deflection unit, a lens module and an optical receiver. The light source emits an emission of light. The reflecting unit includes a light passing unit. This lens module has negative refractive power. The emitted light penetrates the light passing unit and is emitted to the deflection unit. The deflection unit reflects the emitted light and is emitted to the lens module. The emitted light penetrates the lens module and is emitted to an object. The object reflects the emitted light, so that a reflected light from the object first enters the lens module, the reflected light penetrates the lens module and is emitted to the deflection unit, and the deflection unit reflects the reflected light to the reflection unit, The reflective unit reflects the reflected light towards the Optical receiver.

其中可更包括一第一準直透鏡以及一聚焦透鏡，其中該發射光先入射該第一準直透鏡，再穿透該光通過單元射向該偏轉單元，由該反射單元反射的該反射光，先射向該聚焦透鏡再射向該光接收器。 It may further include a first collimating lens and a focusing lens, wherein the emitted light first enters the first collimating lens, and then passes through the light passing unit and is emitted to the deflection unit. The reflected light is reflected by the reflecting unit. , first shoots to the focusing lens and then to the light receiver.

本發明提供另一種光學裝置包括一光源、一反射單元、一偏轉單元、一鏡頭模組、一光接收器及一第二準直透鏡。該光源發出一發射光。該反射單元包括一光通過單元。該鏡頭模組具有負屈光力。該發射光先射向該反射單元，該反射單元反射該發射光射向該偏轉單元，該偏轉單元反射該發射光射向該鏡頭模組，該發射光穿透該鏡頭模組後射向一物體。該物體反射該發射光，使得來自該物體之一反射光先入射該鏡頭模組，該反射光穿透該鏡頭模組射向該偏轉單元，該偏轉單元反射該反射光使該反射光先入射該第二準直透鏡再射向該光通過單元，該反射光再穿透該光通過單元射向該光接收器。 The invention provides another optical device including a light source, a reflection unit, a deflection unit, a lens module, a light receiver and a second collimating lens. The light source emits an emission of light. The reflecting unit includes a light passing unit. This lens module has negative refractive power. The emitted light is first emitted to the reflective unit, the reflective unit reflects the emitted light to the deflection unit, the deflection unit reflects the emitted light to the lens module, the emitted light penetrates the lens module and then emit to a object. The object reflects the emitted light, so that the reflected light from the object first enters the lens module. The reflected light penetrates the lens module and is emitted to the deflection unit. The deflection unit reflects the reflected light so that the reflected light enters first. The second collimating lens then radiates to the light passing unit, and the reflected light passes through the light passing unit and radiates to the light receiver.

其中可更包括一第一準直透鏡以及一聚焦透鏡，其中該發射光先入射該第一準直透鏡再射向該反射單元，該反射單元將該發射光反射射向該偏轉單元，穿透該光通過單元的該反射光先射向該聚焦透鏡再射向該光接收器。 It may further include a first collimating lens and a focusing lens, wherein the emitted light first enters the first collimating lens and then emits to the reflection unit, and the reflection unit reflects the emitted light toward the deflection unit and penetrates The reflected light of the light passing unit first radiates to the focusing lens and then to the light receiver.

其中該偏轉單元可以轉動，使得該發射光入射該偏轉單元後的反射角度改變，進一步使得該發射光入射該鏡頭模組的入射角度改變，最終使得該光學裝置之一偏折角度改變，其中該偏折角度為該鏡頭模組之一光軸與射出該鏡頭模組的該發射光之夾角；或者，該鏡頭模組包括沿一光軸依序排列之一第一透鏡、一第二透鏡及一第三透鏡，其中該第二 透鏡及該第三透鏡可沿該光軸移動以調整各透鏡間距，即當該第二透鏡及該第三透鏡與該偏轉單元間距改變時也可改變該偏折角度。 The deflection unit can rotate, so that the reflection angle of the emitted light after it enters the deflection unit changes, further causing the incident angle of the emitted light to enter the lens module to change, and finally causing a deflection angle of the optical device to change, wherein the The deflection angle is the angle between the optical axis of the lens module and the emitted light emitted from the lens module; alternatively, the lens module includes a first lens, a second lens and a second lens arranged sequentially along an optical axis. a third lens, wherein the second The lens and the third lens can move along the optical axis to adjust the distance between the lenses, that is, when the distance between the second lens, the third lens and the deflection unit changes, the deflection angle can also be changed.

其中該鏡頭模組包括一第一透鏡、一第二透鏡以及一第三透鏡，該第一透鏡具有負屈光力，該第二透鏡具有負屈光力，該第三透鏡具有正屈光力，該第一透鏡、該第二透鏡以及該第三透鏡沿著一光軸依序排列。 The lens module includes a first lens, a second lens and a third lens. The first lens has negative refractive power, the second lens has negative refractive power, and the third lens has positive refractive power. The first lens, The second lens and the third lens are arranged sequentially along an optical axis.

其中該第一透鏡為平凹透鏡，且包括一平面朝向該物體以及一凹面朝向該偏轉單元，該第二透鏡為雙凹透鏡，且包括一凹面朝向該物體以及另一凹面朝向該偏轉單元，該第三透鏡為雙凸透鏡，且包括一凸面朝向該物體以及另一凸面朝向該偏轉單元。 The first lens is a plano-concave lens and includes a flat surface facing the object and a concave surface facing the deflection unit. The second lens is a biconcave lens and includes a concave surface facing the object and another concave surface facing the deflection unit. The three lenses are biconvex lenses and include a convex surface facing the object and another convex surface facing the deflection unit.

其中該偏轉單元可以轉動，該第一透鏡固定不動、該第二透鏡可沿著該光軸移動以及該第三透鏡可沿著該光軸移動，以改變該光學裝置之一偏折角度，該偏折角度為該鏡頭模組之該光軸與射出該鏡頭模組的該發射光之夾角，該偏折角度之範圍為+/-25度至+/-40度，其中，該光學裝置可更滿足以下至少一公式：Y=6.491X-0.161；0.45

Figure 111122647-A0101-12-0003-8
(d1+d2)/TTL
Figure 111122647-A0101-12-0003-9
0.75；其中，Y為該偏折角度，X為該偏轉單元之一轉動角度，公式Y=6.491X-0.161代表該偏折角度與該偏轉單元之該轉動角度呈線性關係，d1是該第一透鏡與該第二透鏡的間距，d2是該第二透鏡與該第三透鏡的間距，TTL是該鏡頭模組總長度。 Wherein the deflection unit can rotate, the first lens is fixed, the second lens can move along the optical axis and the third lens can move along the optical axis to change a deflection angle of the optical device, the The deflection angle is the angle between the optical axis of the lens module and the emitted light emitted from the lens module. The deflection angle ranges from +/-25 degrees to +/-40 degrees, where the optical device can It also satisfies at least one of the following formulas: Y=6.491X-0.161; 0.45
Figure 111122647-A0101-12-0003-8
(d1+d2)/TTL
Figure 111122647-A0101-12-0003-9
0.75; among them, Y is the deflection angle, and X is the rotation angle of the deflection unit. The formula Y=6.491 The distance between the lens and the second lens, d2 is the distance between the second lens and the third lens, and TTL is the total length of the lens module.

其中該光學裝置之一偏折角度與該鏡頭模組之一鏡頭總長度、該第一透鏡與該第二透鏡之一間距以及該第二透鏡與該第三透鏡之一間距成正比。 The deflection angle of the optical device is proportional to the total length of the lens of the lens module, the distance between the first lens and the second lens, and the distance between the second lens and the third lens.

其中該光源為一雷射光源，該雷射光源波長為904nm、1064nm或1550nm。 The light source is a laser light source, and the wavelength of the laser light source is 904nm, 1064nm or 1550nm.

為使本發明之上述目的、特徵、和優點能更明顯易懂，下文特舉較佳實施例並配合所附圖式做詳細說明。 In order to make the above-mentioned objects, features, and advantages of the present invention more clearly understood, preferred embodiments are described in detail below along with the accompanying drawings.

1:光學裝置 1: Optical device

10:光源 10:Light source

20:第一準直透鏡 20: First collimating lens

30:反射單元 30:Reflection unit

40:偏轉單元 40: Deflection unit

50:鏡頭模組 50: Lens module

60:聚焦透鏡 60:Focusing lens

70:光接收器 70: Optical receiver

101:發射光 101: Emit light

102:反射光 102: Reflected light

301:反射面 301: Reflective surface

302:光通過單元 302:Light passing unit

A:偏折角度 A: Deflection angle

L1:第一透鏡 L1: first lens

L2:第二透鏡 L2: Second lens

L3:第三透鏡 L3: Third lens

S1:第一透鏡物體側面 S1: First lens object side

S2:第一透鏡偏轉單元側面 S2: Side of the first lens deflection unit

S3:第二透鏡物體側面 S3: Second lens object side

S4:第二透鏡偏轉單元側面 S4: Side of the second lens deflection unit

S5:第三透鏡物體側面 S5: Third lens object side

S6:第三透鏡偏轉單元側面 S6: Side of third lens deflection unit

OA1:光軸 OA1: optical axis

第1圖係依據本發明之光學裝置之第一實施例的示意圖。 Figure 1 is a schematic diagram of an optical device according to a first embodiment of the present invention.

第2圖係依據本發明之光學裝置之第一實施例的發射光之光學路徑示意圖。 Figure 2 is a schematic diagram of the optical path of emitted light according to the first embodiment of the optical device of the present invention.

第3圖係依據本發明之光學裝置之第一實施例的反射光之光學路徑示意圖。 Figure 3 is a schematic diagram of the optical path of reflected light according to the first embodiment of the optical device of the present invention.

本發明提供一種光學裝置，包括：一光源，此光源發出一發射光；一反射單元，此反射單元包括一光通過單元；一偏轉單元；一鏡頭模組，此鏡頭模組具有負屈光力；及一光接收器；其中此發射光穿透此光通過單元射向此偏轉單元，此偏轉單元反射此發射光射向此鏡頭模組，此發射光穿透此鏡頭模組後射向一物體；其中此物體反射此發射光，使得來自此物體之一反射光先入射此鏡頭模組，此反射光穿透此鏡頭模組射向此偏轉單元，此偏轉單元反射此反射光射向此反射單元，此反射單元反射此反射光射向此光接收器。 The invention provides an optical device, including: a light source that emits emitted light; a reflection unit that includes a light passing unit; a deflection unit; a lens module that has negative refractive power; and An optical receiver; wherein the emitted light penetrates the light passing unit and is emitted to the deflection unit, the deflection unit reflects the emitted light and is emitted to the lens module, and the emitted light is emitted to an object after penetrating the lens module; The object reflects the emitted light, so that the reflected light from the object first enters the lens module. The reflected light penetrates the lens module and is emitted to the deflection unit. The deflection unit reflects the reflected light to the reflection unit. , the reflective unit reflects the reflected light toward the light receiver.

本發明提供另一種光學裝置，包括：一光源，此光源發出一發射光；一反射單元，此反射單元包括一光通過單元；一偏轉單元；一 鏡頭模組，此鏡頭模組具有負屈光力；一光接收器；及一第二準直透鏡；其中此發射光先射向此反射單元，此反射單元反射此發射光射向此偏轉單元，此偏轉單元反射此發射光射向此鏡頭模組，此發射光穿透此鏡頭模組後射向一物體；其中此物體反射此發射光，使得來自此物體之一反射光先入射此鏡頭模組，此反射光穿透此鏡頭模組射向此偏轉單元，此偏轉單元反射此反射光使此反射光先入射此第二準直透鏡再射向此光通過單元，此反射光再穿透此光通過單元射向此光接收器。 The invention provides another optical device, which includes: a light source that emits emitted light; a reflection unit that includes a light passing unit; a deflection unit; Lens module, this lens module has negative refractive power; a light receiver; and a second collimating lens; wherein the emitted light is first emitted to the reflective unit, and the reflective unit reflects the emitted light to the deflection unit, where The deflection unit reflects the emitted light toward the lens module, and the emitted light penetrates the lens module and then emits toward an object; the object reflects the emitted light, so that one of the reflected lights from the object first enters the lens module , the reflected light penetrates the lens module and is emitted to the deflection unit. The deflection unit reflects the reflected light, causing the reflected light to first enter the second collimating lens and then to the light passing unit. The reflected light then passes through the Light passes through the unit towards this light receiver.

現詳細說明本發明之光學裝置之第一實施例。請參閱第1圖。光學裝置1包括一光源10、一第一準直透鏡20、一反射單元30、一偏轉單元40、一鏡頭模組50、一聚焦透鏡60及一光接收器70。反射單元30包括一反射面301及一光通過單元302。鏡頭模組50包括一第一透鏡L1、一第二透鏡L2及一第三透鏡L3，第一透鏡L1、第二透鏡L2及第三透鏡L3沿著一光軸OA1依序排列。 The first embodiment of the optical device of the present invention will now be described in detail. See picture 1. The optical device 1 includes a light source 10 , a first collimating lens 20 , a reflection unit 30 , a deflection unit 40 , a lens module 50 , a focusing lens 60 and a light receiver 70 . The reflective unit 30 includes a reflective surface 301 and a light passing unit 302. The lens module 50 includes a first lens L1, a second lens L2 and a third lens L3. The first lens L1, the second lens L2 and the third lens L3 are arranged in sequence along an optical axis OA1.

請同時參閱第2圖及第3圖，第2圖係依據本發明之光學裝置之第一實施例的發射光之光學路徑示意圖，第3圖係依據本發明之光學裝置之第一實施例的反射光之光學路徑示意圖。光源10發出一發射光101，發射光101先射向第一準直透鏡20，第一準直透鏡20將發散的發射光101調整成平行的發射光101，光通過單元302位於反射單元30的中心處，發射光101直接穿過光通過單元302射向偏轉單元40，偏轉單元40反射發射光101射向鏡頭50，射向鏡頭50的發射光101依序通過第三透鏡L3、第二透鏡L2及第一透鏡L1，最後射向一物體(未圖示)，射出鏡頭50的發射光101與光軸OA1的夾角即為此光學裝置1之一偏折角度A。物體(未圖 示)再將入射的發射光101反射，使得來自物體(未圖示)之一反射光102先入射鏡頭模組50，入射鏡頭模組50的反射光102依序通過第一透鏡L1、第二透鏡L2及第三透鏡L3，再射向偏轉單元40，偏轉單元40反射反射光102射向反射單元30，反射單元30的反射面301將反射光102反射射向聚焦透鏡60，聚焦透鏡60將反射光102聚焦最後由光接收器70接收。 Please refer to Figures 2 and 3 at the same time. Figure 2 is a schematic diagram of the optical path of emitted light according to the first embodiment of the optical device of the present invention. Figure 3 is a schematic diagram of the optical path of the optical device according to the first embodiment of the present invention. Schematic diagram of the optical path of reflected light. The light source 10 emits an emitted light 101. The emitted light 101 is first directed to the first collimating lens 20. The first collimating lens 20 adjusts the divergent emitted light 101 into parallel emitted light 101. The light passing unit 302 is located at the reflection unit 30. At the center, the emitted light 101 directly passes through the light passing unit 302 and is directed to the deflection unit 40. The deflection unit 40 reflects the emitted light 101 and is directed to the lens 50. The emitted light 101 directed to the lens 50 passes through the third lens L3 and the second lens in sequence. L2 and the first lens L1 finally emit to an object (not shown), and the angle between the emitted light 101 emitted from the lens 50 and the optical axis OA1 is the deflection angle A of the optical device 1 . Object (not pictured) (shown) and then reflect the incident emitted light 101, so that one of the reflected light 102 from the object (not shown) first enters the lens module 50, and the reflected light 102 incident on the lens module 50 sequentially passes through the first lens L1, the second lens L1 and the second lens L1. The lens L2 and the third lens L3 are then directed to the deflection unit 40. The deflection unit 40 reflects the reflected light 102 to the reflective unit 30. The reflective surface 301 of the reflective unit 30 reflects the reflected light 102 to the focusing lens 60. The focusing lens 60 will The reflected light 102 is focused and finally received by the light receiver 70 .

上述第一實施例中，鏡頭模組50具有負屈光力。第一透鏡L1為平凹透鏡具有負屈光力，其面向物體側面S1為平面，面向偏轉單元側面S2為凹面。第二透鏡L2為雙凹透鏡具有負屈光力，其面向物體側面S3為凹面，面向偏轉單元側面S4為凹面。第三透鏡L3為雙凸透鏡具有正屈光力，其面向物體側面S5為凸面，面向偏轉單元側面S6為凸面。 In the above-mentioned first embodiment, the lens module 50 has negative refractive power. The first lens L1 is a plano-concave lens with negative refractive power. The side S1 facing the object is a flat surface, and the side S2 facing the deflection unit is a concave surface. The second lens L2 is a biconcave lens with negative refractive power. The side S3 facing the object is a concave surface, and the side S4 facing the deflection unit is a concave surface. The third lens L3 is a biconvex lens with positive refractive power. The side S5 facing the object is a convex surface, and the side S6 facing the deflection unit is a convex surface.

表一為第1圖中鏡頭模組50之各透鏡之相關參數表。 Table 1 is a table of relevant parameters of each lens of the lens module 50 in Figure 1.

Figure 111122647-A0101-12-0006-2
Figure 111122647-A0101-12-0006-2

上述第一實施例中，光源10為一雷射光源，其光波長為904nm，偏轉單元40可以轉動，使得被偏轉單元40反射的發射光101產生偏折，造成發射光101入射鏡頭模組50的角度改變，最終造成發射光101離開鏡頭模組50時與光軸OA1不同軸。也就是說利用控制偏轉單元40的轉動角度，相對使發射光101離開鏡頭模組50的角度改變，即改變光學裝置 1的偏折角度A，使得射出鏡頭模組50的發射光101可在相對光軸OA1一定範圍的角度內掃描。上述第一實施例中，偏轉單元40的轉動角度範圍為+/-5度，使得發射光101會以+/-10度的變動範圍入射鏡頭模組50，最終以+/-32.3度的變動範圍射出鏡頭模組50，即光學裝置1的偏折角度A的範圍為+/-32.3度。表二為偏轉單元40的轉動角度相對於光學裝置1的偏折角度A之關係表，表二中的偏折角度A的誤差範圍為+/-5%，以數值區間呈現數據。當以偏折角度A為Y軸數值、偏轉單元轉動角度為X軸數值進行作圖分析，可得到偏折角度A與偏轉單元轉動角度呈線性關係，兩者關係式為二元一次方程式之公式：Y=6.491X-0.161。 In the above-mentioned first embodiment, the light source 10 is a laser light source with a light wavelength of 904 nm. The deflection unit 40 can rotate so that the emitted light 101 reflected by the deflection unit 40 is deflected, causing the emitted light 101 to enter the lens module 50 The angle changes, eventually causing the emitted light 101 to be out of axis with the optical axis OA1 when it leaves the lens module 50 . That is to say, the rotation angle of the deflection unit 40 is controlled to change the angle at which the emitted light 101 leaves the lens module 50 , that is, the optical device is changed. The deflection angle A of 1 enables the emitted light 101 emitted from the lens module 50 to scan within a certain range of angles relative to the optical axis OA1. In the above-mentioned first embodiment, the rotation angle range of the deflection unit 40 is +/-5 degrees, so that the emitted light 101 will enter the lens module 50 with a variation range of +/-10 degrees, and finally with a variation range of +/-32.3 degrees. The range of the deflection angle A of the lens module 50 , that is, the optical device 1 is +/-32.3 degrees. Table 2 is a relationship table between the rotation angle of the deflection unit 40 and the deflection angle A of the optical device 1. The error range of the deflection angle A in Table 2 is +/-5%, and the data is presented in numerical intervals. When drawing and analyzing the deflection angle A as the Y-axis value and the deflection unit rotation angle as the :Y=6.491X-0.161.

Figure 111122647-A0101-12-0007-3
Figure 111122647-A0101-12-0007-3

上述第一實施例係利用控制偏轉單元40的轉動角度以改變光學裝置1的偏折角度A，此時鏡頭模組50之第一透鏡L1、第二透鏡L2及第三透鏡L3皆固定不動，即第一透鏡L1與第二透鏡L2的間距以及第二透鏡L2與第三透鏡L3的間距固定不變。也可以控制偏轉單元40的轉動角度同時調整第一透鏡L1與第二透鏡L2的間距以及第二透鏡L2與第三透鏡L3的間距，如此可進一步擴大光學裝置1之偏折角度A的範圍。各透鏡間距調整的方法係將第一透鏡L1固定不動，第二透鏡L2及第三透鏡L3沿著光軸OA1移動。表三為當偏轉單元40轉動角度範圍為+/-5度時，在不同鏡 透間距下所得到的偏折角度A的範圍之關係表。由表三可知，當偏轉單元40轉動角度範圍為+/-5度，在不同的鏡透間距下，可得到偏折角度A的範圍為+/-25度、+/-32.3度或+/-40度，當偏折角度A的範圍為+/-32.2度時為本發明之一較佳實施例之一。從表三可以發現當偏折角度A的範圍越大，則鏡頭總長度愈長、第一透鏡L1與第二透鏡L2的間距愈大以及第二透鏡L2與第三透鏡L3的間距越大，也就是說偏折角度A的範圍與鏡頭總長度、第一透鏡L1與第二透鏡L2的間距以及第二透鏡L2與第三透鏡L3的間距成正比；換句話說，即當該第二透鏡及該第三透鏡與該偏轉單元間距改變時也可改變該偏折角度；其中從表三可以得知各透鏡之間距與該鏡頭模組總長度的比例關係符合公式：0.45

Figure 111122647-A0101-12-0008-10
(d1+d2)/TTL
Figure 111122647-A0101-12-0008-11
0.75。其中公式：Y=6.491X-0.161及公式：0.45
Figure 111122647-A0101-12-0008-12
(d1+d2)/TTL
Figure 111122647-A0101-12-0008-13
0.75至少滿足其一即可，但當公式：Y=6.491X-0.161與公式：0.45
Figure 111122647-A0101-12-0008-14
(d1+d2)/TTL
Figure 111122647-A0101-12-0008-15
0.75同時滿足時，則會是較佳實施例之一。 In the first embodiment described above, the rotation angle of the deflection unit 40 is controlled to change the deflection angle A of the optical device 1. At this time, the first lens L1, the second lens L2 and the third lens L3 of the lens module 50 are all fixed. That is, the distance between the first lens L1 and the second lens L2 and the distance between the second lens L2 and the third lens L3 are fixed. The rotation angle of the deflection unit 40 can also be controlled while adjusting the distance between the first lens L1 and the second lens L2 and the distance between the second lens L2 and the third lens L3. This can further expand the range of the deflection angle A of the optical device 1. The method of adjusting the distance between each lens is to fix the first lens L1 and move the second lens L2 and the third lens L3 along the optical axis OA1. Table 3 is a relationship table showing the range of the deflection angle A obtained under different lens-lens spacing when the rotation angle range of the deflection unit 40 is +/-5 degrees. It can be seen from Table 3 that when the rotation angle range of the deflection unit 40 is +/-5 degrees, under different lens-lens spacing, the range of the deflection angle A can be +/-25 degrees, +/-32.3 degrees or +/ -40 degrees, when the range of the deflection angle A is +/-32.2 degrees, it is one of the preferred embodiments of the present invention. It can be found from Table 3 that when the range of the deflection angle A is larger, the total length of the lens is longer, the distance between the first lens L1 and the second lens L2 is larger, and the distance between the second lens L2 and the third lens L3 is larger. That is to say, the range of the deflection angle A is proportional to the total length of the lens, the distance between the first lens L1 and the second lens L2, and the distance between the second lens L2 and the third lens L3; in other words, when the second lens And when the distance between the third lens and the deflection unit changes, the deflection angle can also be changed; from Table 3, it can be known that the proportional relationship between the distance between the lenses and the total length of the lens module conforms to the formula: 0.45
Figure 111122647-A0101-12-0008-10
(d1+d2)/TTL
Figure 111122647-A0101-12-0008-11
0.75. Among them, the formula: Y=6.491X-0.161 and the formula: 0.45
Figure 111122647-A0101-12-0008-12
(d1+d2)/TTL
Figure 111122647-A0101-12-0008-13
0.75 can satisfy at least one of them, but when the formula: Y=6.491X-0.161 and the formula: 0.45
Figure 111122647-A0101-12-0008-14
(d1+d2)/TTL
Figure 111122647-A0101-12-0008-15
When 0.75 is satisfied at the same time, it will be one of the better embodiments.

Figure 111122647-A0101-12-0008-4
Figure 111122647-A0101-12-0008-4

現詳細說明本發明之光學裝置之第二實施例。光學裝置2(未圖式)包括一光源、一第一準直透鏡、一反射單元、一偏轉單元、一鏡頭模組、一第二準直透鏡、一聚焦透鏡及一光接收器。反射單元包括一反射面及一光通過單元。鏡頭模組包括一第一透鏡、一第二透鏡及一第三透 鏡，第一透鏡、第二透鏡及第三透鏡沿著一光軸依序排列。第二實施例的光學裝置(未圖式)比第一實施例的光學裝置1增設第二準直透鏡，其被設置於光通過單元與偏轉單元之間。因第二實施例與第一實施例近似，所以省略第二實施例的光學裝置之圖示。第二實施例的光學裝置(未圖式)，其光源、第一準直透鏡、光接收器及聚焦透鏡的設置位置不同於第一實施例的光學裝置1，將第一實施例的光學裝置1之光源10與光接收器70的位置互換以及第一準直透鏡20與聚焦透鏡60的位置互換，即為第二實施例的光學裝置(未圖式)之光源、第一準直透鏡、光接收器及聚焦透鏡的設置位置。第二實施例的光學裝置(未圖式)由光源發出一發射光，發射光先射向第一準直透鏡，第一準直透鏡將發散的發射光調整成平行的發射光射向反射單元，經由反射面將發射光反射射向偏轉單元，偏轉單元反射發射光射向鏡頭模組，射向鏡頭模組的發射光依序通過第三透鏡、第二透鏡及第一透鏡，最後射向一物體(未圖示)，射出鏡頭模組的發射光與光軸的夾角即為光學裝置(未圖示)之一偏折角度。物體(未圖示)再將入射的發射光反射，使得來自物體(未圖示)之一反射光先入射鏡頭模組，入射鏡頭模組的反射光依序通過第一透鏡、第二透鏡及第三透鏡，再射向偏轉單元，偏轉單元反射反射光射向第二準直透鏡，第二準直透鏡將發散的反射光調整成平行的反射光，光通過單元位於反射單元的中心處，反射光直接穿過光通過單元射向聚焦透鏡，聚焦透鏡將反射光聚焦最後由光接收器接收。所以第二實施例的光學裝置(未圖式)其發射光與反射光的光學路徑不同於第一實施例的光學裝置1。 The second embodiment of the optical device of the present invention will now be described in detail. The optical device 2 (not shown) includes a light source, a first collimating lens, a reflection unit, a deflection unit, a lens module, a second collimating lens, a focusing lens and a light receiver. The reflective unit includes a reflective surface and a light passing unit. The lens module includes a first lens, a second lens and a third lens The first lens, the second lens and the third lens are arranged in sequence along an optical axis. The optical device (not shown) of the second embodiment is equipped with a second collimating lens compared to the optical device 1 of the first embodiment, which is disposed between the light passing unit and the deflection unit. Since the second embodiment is similar to the first embodiment, the illustration of the optical device of the second embodiment is omitted. The optical device (not shown) of the second embodiment is different from the optical device 1 of the first embodiment in that the positions of the light source, the first collimating lens, the light receiver and the focusing lens are different from that of the optical device 1 of the first embodiment. The position exchange of the light source 10 and the light receiver 70 in 1 and the position exchange of the first collimating lens 20 and the focusing lens 60 are the light source, the first collimating lens, and the optical device (not shown) of the second embodiment. The location of the light receiver and focusing lens. The optical device (not shown) of the second embodiment emits an emitted light from a light source. The emitted light is first directed to the first collimating lens. The first collimating lens adjusts the divergent emitted light into parallel emitted light and is directed to the reflection unit. , the emitted light is reflected to the deflection unit through the reflective surface, and the deflection unit reflects the emitted light to the lens module. The emitted light to the lens module passes through the third lens, the second lens and the first lens in sequence, and finally shoots to For an object (not shown), the angle between the emitted light emitted from the lens module and the optical axis is the deflection angle of the optical device (not shown). The object (not shown) then reflects the incident emitted light, so that one of the reflected lights from the object (not shown) first enters the lens module. The reflected light incident on the lens module sequentially passes through the first lens, the second lens and The third lens then shoots to the deflection unit. The deflection unit reflects the reflected light to the second collimating lens. The second collimating lens adjusts the divergent reflected light into parallel reflected light. The light passing unit is located at the center of the reflecting unit. The reflected light directly passes through the light passing unit and is emitted to the focusing lens. The focusing lens focuses the reflected light and is finally received by the light receiver. Therefore, the optical paths of emitted light and reflected light of the optical device (not shown) of the second embodiment are different from the optical device 1 of the first embodiment.

上述實施例中的反射單元可以為一反射鏡，光通過單元可以為一洞孔，偏轉單元可以為一微機電反射鏡，光接收器可以為一崩潰光二極體(APD)。 The reflection unit in the above embodiment can be a reflector, the light passing unit can be a hole, the deflection unit can be a microelectromechanical reflector, and the light receiver can be an collapsed photodiode (APD).

雖然本發明已以較佳實施方式揭露如上，然其並非用以限定本發明，任何熟悉此技藝者，在不脫離本發明的精神和範圍內，當可作各種的更動與潤飾，因此本發明的保護範圍當視後附的申請專利範圍所界定者為準。 Although the present invention has been disclosed in preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the patent application attached.

1:光學裝置 1: Optical device

10:光源 10:Light source

20:準直透鏡 20:Collimating lens

30:反射單元 30:Reflection unit

40:偏轉單元 40: Deflection unit

50:鏡頭模組 50: Lens module

60:聚焦透鏡 60:Focusing lens

70:光接收器 70: Optical receiver

301:反射面 301: Reflective surface

302:光通過單元 302:Light passing unit

OA1:光軸 OA1: optical axis

L1:第一透鏡 L1: first lens

L2:第二透鏡 L2: Second lens

L3:第三透鏡 L3: Third lens

S1:第一透鏡物體側面 S1: First lens object side

S2:第一透鏡偏轉單元側面 S2: Side of the first lens deflection unit

S3:第二透鏡物體側面 S3: Second lens object side

S4:第二透鏡偏轉單元側面 S4: Side of the second lens deflection unit

S5:第三透鏡物體側面 S5: Third lens object side

S6:第三透鏡偏轉單元側面 S6: Side of third lens deflection unit

Claims (10)

一種光學裝置，包括：一光源，該光源發出一發射光；一反射單元，該反射單元包括一光通過單元；一偏轉單元；一鏡頭模組，該鏡頭模組具有負屈光力；以及一光接收器；其中該鏡頭模組包括一第一透鏡以及一第二透鏡，該第一透鏡具有負屈光力，該第二透鏡具有負屈光力，該第一透鏡以及該第二透鏡沿著一光軸依序排列；其中該發射光穿透該光通過單元射向該偏轉單元，該偏轉單元反射該發射光射向該鏡頭模組，該發射光穿透該鏡頭模組後射向一物體；其中該物體反射該發射光，使得來自該物體之一反射光先入射該鏡頭模組，該反射光穿透該鏡頭模組射向該偏轉單元，該偏轉單元反射該反射光射向該反射單元，該反射單元反射該反射光射向該光接收器。 An optical device includes: a light source that emits emitted light; a reflection unit that includes a light passing unit; a deflection unit; a lens module with negative refractive power; and a light receiving unit. device; wherein the lens module includes a first lens and a second lens, the first lens has negative refractive power, the second lens has negative refractive power, the first lens and the second lens are sequentially along an optical axis Arrangement; wherein the emitted light penetrates the light passing unit and is emitted to the deflection unit, the deflection unit reflects the emitted light and is emitted to the lens module, and the emitted light is emitted to an object after penetrating the lens module; wherein the object Reflect the emitted light so that a reflected light from the object first enters the lens module, the reflected light penetrates the lens module and is directed to the deflection unit, and the deflection unit reflects the reflected light to the reflective unit. The unit reflects the reflected light toward the light receiver. 如申請專利範圍第1項所述之光學裝置，其更包括一第一準直透鏡以及一聚焦透鏡，其中：該發射光先入射該第一準直透鏡，再穿透該光通過單元射向該偏轉單元；以及由該反射單元反射的該反射光，先射向該聚焦透鏡再射向該光接收器。 The optical device as described in Item 1 of the patent application further includes a first collimating lens and a focusing lens, wherein: the emitted light first enters the first collimating lens, and then passes through the light passing unit to the The deflection unit; and the reflected light reflected by the reflection unit first radiates to the focusing lens and then to the light receiver. 一種光學裝置，包括：一光源，該光源發出一發射光； 一反射單元，該反射單元包括一光通過單元；一偏轉單元；一鏡頭模組，該鏡頭模組具有負屈光力；一光接收器；以及一第二準直透鏡；其中該鏡頭模組包括一第一透鏡以及一第二透鏡，該第一透鏡具有負屈光力，該第二透鏡具有負屈光力，該第一透鏡以及該第二透鏡沿著一光軸依序排列；其中該第一透鏡為平凹透鏡；其中該第二透鏡為雙凹透鏡；其中該發射光先射向該反射單元，該反射單元反射該發射光射向該偏轉單元，該偏轉單元反射該發射光射向該鏡頭模組，該發射光穿透該鏡頭模組後射向一物體；其中該物體反射該發射光，使得來自該物體之一反射光先入射該鏡頭模組，該反射光穿透該鏡頭模組射向該偏轉單元，該偏轉單元反射該反射光使該反射光先入射該第二準直透鏡再射向該光通過單元，該反射光再穿透該光通過單元射向該光接收器。 An optical device includes: a light source emitting an emitted light; A reflection unit, the reflection unit includes a light passing unit; a deflection unit; a lens module, the lens module has negative refractive power; a light receiver; and a second collimating lens; wherein the lens module includes a A first lens and a second lens, the first lens has negative refractive power, the second lens has negative refractive power, the first lens and the second lens are arranged in sequence along an optical axis; wherein the first lens is planar Concave lens; wherein the second lens is a biconcave lens; wherein the emitted light is first emitted to the reflection unit, the reflection unit reflects the emitted light to the deflection unit, the deflection unit reflects the emitted light to the lens module, the The emitted light penetrates the lens module and then radiates to an object; the object reflects the emitted light, so that a reflected light from the object first enters the lens module, and the reflected light penetrates the lens module and radiates to the deflection unit, the deflection unit reflects the reflected light so that the reflected light first enters the second collimating lens and then radiates to the light passing unit, and the reflected light then passes through the light passing unit and radiates to the light receiver. 如申請專利範圍第3項所述之光學裝置，其更包括一第一準直透鏡以及一聚焦透鏡，其中：該發射光先入射該第一準直透鏡再射向該反射單元，該反射單元將該發射光反射射向該偏轉單元；以及穿透該光通過單元的該反射光先射向該聚焦透鏡再射向該光接收器。 The optical device as described in item 3 of the patent application further includes a first collimating lens and a focusing lens, wherein: the emitted light first enters the first collimating lens and then radiates to the reflection unit, and the reflection unit The emitted light is reflected toward the deflection unit; and the reflected light that penetrates the light passing unit is first directed toward the focusing lens and then toward the light receiver. 如申請專利範圍第1項至第4項中任一項所述之光學裝置，其中該偏轉單元可以轉動，使得該發射光入射該偏轉單元後的反射角度改變，進一步使得該發射光入射該鏡頭模組的入射角度改變，最終使得該光學裝置之一偏折角度改變，其中該偏折角度為該鏡頭模組之一光軸與射出該鏡頭模組的該發射光之夾角；或者，該鏡頭模組包括沿該光軸依序排列之該第一透鏡、該第二透鏡及一第三透鏡，其中該第二透鏡及該第三透鏡可沿該光軸移動以調整各透鏡間距，即當該第二透鏡及該第三透鏡與該偏轉單元間距改變時也可改變該偏折角度。 The optical device as described in any one of items 1 to 4 of the patent application, wherein the deflection unit can rotate, so that the reflection angle of the emitted light after incident on the deflection unit changes, further allowing the emitted light to enter the lens The change in the incident angle of the module ultimately changes the deflection angle of the optical device, where the deflection angle is the angle between the optical axis of the lens module and the emitted light emitted from the lens module; or, the lens The module includes the first lens, the second lens and a third lens arranged sequentially along the optical axis, wherein the second lens and the third lens can move along the optical axis to adjust the distance between the lenses, that is, when The deflection angle can also be changed when the distance between the second lens, the third lens and the deflection unit changes. 如申請專利範圍第1項至第4項中任一項所述之光學裝置，其中該鏡頭模組更包括一第三透鏡，該第三透鏡具有正屈光力，其中該第一透鏡、該第二透鏡以及該第三透鏡沿著該光軸依序排列。 The optical device as described in any one of items 1 to 4 of the patent application scope, wherein the lens module further includes a third lens, the third lens has positive refractive power, wherein the first lens, the second lens The lens and the third lens are arranged in sequence along the optical axis. 如申請專利範圍第6項所述之光學裝置，其中：該第一透鏡為平凹透鏡，且包括一平面朝向該物體以及一凹面朝向該偏轉單元；該第二透鏡為雙凹透鏡，且包括一凹面朝向該物體以及另一凹面朝向該偏轉單元；以及該第三透鏡為雙凸透鏡，且包括一凸面朝向該物體以及另一凸面朝向該偏轉單元。 The optical device as described in item 6 of the patent application, wherein: the first lens is a plano-concave lens and includes a flat surface facing the object and a concave surface facing the deflection unit; the second lens is a biconcave lens and includes a concave surface facing the object and another concave surface facing the deflection unit; and the third lens is a biconvex lens and includes a convex surface facing the object and another convex surface facing the deflection unit. 如申請專利範圍第6項所述之光學裝置，其中該偏轉單元可以轉動，該第一透鏡固定不動、該第二透鏡可沿著該光軸移動以及該第三透鏡可沿著該光軸移動，以改變該光學裝置之一偏折角度，該偏折角度為該鏡頭 模組之該光軸與射出該鏡頭模組的該發射光之夾角，其中該偏折角度之範圍為+/-25度至+/-40度，其中，該光學裝置更滿足以下至少一公式：Y=6.491X-0.161；0.45
Figure 111122647-A0305-02-0017-2
(d1+d2)/TTL
Figure 111122647-A0305-02-0017-3
0.75；其中，Y為該偏折角度，X為該偏轉單元之一轉動角度，公式Y=6.491X-0.161代表該偏折角度與該偏轉單元之該轉動角度呈線性關係，d1是該第一透鏡與該第二透鏡的間距，d2是該第二透鏡與該第三透鏡的間距，TTL是該鏡頭模組總長度。 The optical device as described in item 6 of the patent application, wherein the deflection unit can rotate, the first lens is fixed, the second lens can move along the optical axis, and the third lens can move along the optical axis. , to change the deflection angle of the optical device, the deflection angle is the angle between the optical axis of the lens module and the emitted light emitted from the lens module, where the range of the deflection angle is +/-25 degree to +/-40 degrees, where the optical device satisfies at least one of the following formulas: Y=6.491X-0.161; 0.45
Figure 111122647-A0305-02-0017-2
(d1+d2)/TTL
Figure 111122647-A0305-02-0017-3
0.75; among them, Y is the deflection angle, and X is the rotation angle of the deflection unit. The formula Y=6.491 The distance between the lens and the second lens, d2 is the distance between the second lens and the third lens, and TTL is the total length of the lens module. 如申請專利範圍第8項所述之光學裝置，其中該光學裝置之該偏折角度與該鏡頭模組之一鏡頭總長度、該第一透鏡與該第二透鏡之一間距以及該第二透鏡與該第三透鏡之一間距成正比。 The optical device as described in item 8 of the patent application, wherein the deflection angle of the optical device is related to the total length of the lens of the lens module, the distance between the first lens and the second lens, and the second lens Proportional to the distance between the third lenses. 如申請專利範圍第1項或第3項所述之光學裝置，其中該光源為一雷射光源，該雷射光源波長為904nm、1064nm或1550nm。 For example, the optical device described in item 1 or 3 of the patent application scope, wherein the light source is a laser light source, and the wavelength of the laser light source is 904nm, 1064nm or 1550nm.
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US20180267147A1 (en) * 2015-04-28 2018-09-20 Korea Electronics Technology Institute Multi-channel lidar scanner optical system using mirror rotation manner
CN110300900A (en) * 2017-02-20 2019-10-01 罗伯特·博世有限公司 For sensing the laser radar sensor of object
CN111164450A (en) * 2017-10-10 2020-05-15 黑拉有限责任两合公司 Optical device for a distance measuring device according to the lidar principle
CN113625295A (en) * 2021-06-22 2021-11-09 无锡微奥科技有限公司 Optical system for laser radar and laser radar

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180267147A1 (en) * 2015-04-28 2018-09-20 Korea Electronics Technology Institute Multi-channel lidar scanner optical system using mirror rotation manner
CN110300900A (en) * 2017-02-20 2019-10-01 罗伯特·博世有限公司 For sensing the laser radar sensor of object
CN111164450A (en) * 2017-10-10 2020-05-15 黑拉有限责任两合公司 Optical device for a distance measuring device according to the lidar principle
CN113625295A (en) * 2021-06-22 2021-11-09 无锡微奥科技有限公司 Optical system for laser radar and laser radar

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