TW202107136A - Spacer ring, lens system, method for manufacturing spacer ring, and method for assembling lens system in which the spacer ring has a main surface that is shaped as a reverse of a shape of a peripheral portion of a lens surface of a lens - Google Patents

Spacer ring, lens system, method for manufacturing spacer ring, and method for assembling lens system in which the spacer ring has a main surface that is shaped as a reverse of a shape of a peripheral portion of a lens surface of a lens Download PDF

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TW202107136A
TW202107136A TW108128451A TW108128451A TW202107136A TW 202107136 A TW202107136 A TW 202107136A TW 108128451 A TW108128451 A TW 108128451A TW 108128451 A TW108128451 A TW 108128451A TW 202107136 A TW202107136 A TW 202107136A
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lens
spacer ring
shape
lenses
aforementioned
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TW108128451A
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川田正和
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川田正和
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Abstract

Provided are a spacer ring, a lens system, a method for manufacturing the spacer ring, and a method for assembling the lens system. The assembling of the lens system can be easily carried out without using special equipment and a distance between centers of the lens can be maintained with high accuracy. The spacer ring is structured as an annular or rectangular frame and a main surface (1a) at one side is formed in a shape that is a reverse shape of a peripheral portion of a lens surface (2a) of a lens (2) that is to be disposed on the one side, so that positioning of the lens (2) can be achieved by having the main surface (1a) at the one side in contact with a surface of the peripheral portion of the lens surface (2a).

Description

間隔環、透鏡系統、間隔環的製造方法及透鏡系統的組裝方法Spacer ring, lens system, spacer ring manufacturing method, and lens system assembly method

本發明，是有關於間隔環、透鏡系統、間隔環的製造方法及透鏡系統的組裝方法，且是有關於透鏡系統的組裝不需要使用特殊的設備可容易地進行，且可以將透鏡中心間距離高精度地維持的間隔環、透鏡系統、間隔環的製造方法及透鏡系統的組裝方法。The present invention relates to a spacer ring, a lens system, a method of manufacturing the spacer ring, and a method of assembling the lens system. It also relates to the lens system assembly can be easily carried out without the use of special equipment, and the distance between the lens centers can be reduced. Spacer ring, lens system, spacer ring manufacturing method, and lens system assembly method that are maintained with high accuracy.

習知，在將複數透鏡配置於同一光軸上地構成透鏡系統時，如第5圖所示，藉由將間隔環102位在各透鏡101、101之間，而將各透鏡101、101之間的空氣間隔決定在規定的間隔。但是，即使將間隔環102的厚度高精度地管理，因為間隔環102是與透鏡101的端緣部分抵接地定位，所以會被端緣部分的些微的倒角(平錐面)、和端緣部分的形狀精度影響，在透鏡中心間距離中發生誤差。Conventionally, when a lens system is configured by arranging a plurality of lenses on the same optical axis, as shown in Fig. 5, by positioning the spacer ring 102 between the lenses 101 and 101, The air interval between the two is determined at the specified interval. However, even if the thickness of the spacer ring 102 is controlled with high precision, because the spacer ring 102 is positioned in contact with the end edge of the lens 101, it will be slightly chamfered (flat tapered surface) and the end edge. Part of the shape accuracy is affected, and errors occur in the distance between the lens centers.

在近年來的透鏡中心間距離的容許誤差變小的照片用透鏡系統、和顯微鏡用對物透鏡和投影光學系等的高精度透鏡系中，依據間隔環102的使用，會無法達成充分的精度維持。In recent years, the allowable error of the distance between lens centers has been reduced. In high-precision lens systems such as lens systems for photographs, objective lenses for microscopes and projection optical systems, the use of spacer ring 102 may not achieve sufficient accuracy. maintain.

在這些的光學系中，如第6圖所示，將各透鏡101各在圓環狀的金屬盤103固定好，藉由透視***了這些的鏡筒104，來將鏡筒104內的各金屬盤103的位置及傾斜把握，將各金屬盤103固定於鏡筒104內的規定位置(專利文獻1)。 [習知技術文獻] [專利文獻]In these optical systems, as shown in FIG. 6, each lens 101 is fixed to an annular metal disk 103, and the lens barrel 104 is inserted through the lens barrel 104 to remove the metal in the lens barrel 104. The position and tilt of the disc 103 are grasped, and each metal disc 103 is fixed to a predetermined position in the lens barrel 104 (Patent Document 1). [Literature Technical Literature] [Patent Literature]

[專利文獻1] 日本特開2004-219608號公報[Patent Document 1] JP 2004-219608 A

[本發明所欲解決的課題][Problems to be solved by the present invention]

如前述的將鏡筒104透視的組裝方法，因為必需將全部的透鏡101各固定在金屬盤103所以繁雜，且，需要特殊的透視設備。As mentioned above, the assembling method of the lens barrel 104 for see-through is complicated because it is necessary to fix all the lenses 101 on the metal plate 103, and special see-through equipment is required.

在此，本發明的課題是提供一種間隔環、透鏡系統、間隔環的製造方法及透鏡系統的組裝方法，使透鏡系統的組裝不需要使用特殊的設備可容易地進行，且可以將透鏡中心間距離高精度地維持。 [用以解決課題的手段]Here, the subject of the present invention is to provide a spacer ring, a lens system, a method of manufacturing the spacer ring, and a method of assembling the lens system so that the assembly of the lens system can be easily carried out without the use of special equipment, and the center of the lens can be separated The distance is maintained with high precision. [Means to solve the problem]

為了解決前述課題，本發明的申請專利範圍第1項的間隔環，是構成圓環狀或是矩形框狀，至少一方的主面部是成為將被配置於一方側的透鏡的透鏡面周圍側的形狀反轉的形狀，藉由將該一方的主面部與該透鏡面周圍側面接觸，而進行該透鏡的定位。In order to solve the aforementioned problems, the spacer ring of the first item of the scope of patent application of the present invention is formed in an annular or rectangular frame shape, and at least one of the main faces is to be the side around the lens surface of the lens to be arranged on one side. In the shape reversed, positioning of the lens is performed by contacting the one main surface with the peripheral side surface of the lens.

本發明的申請專利範圍第2項的間隔環，是如申請專利範圍第1項的間隔環，其中，一方及另一方的主面部，是各別成為將被配置於一方側的一透鏡及被配置於另一方側的其他的透鏡的透鏡面周圍側的形狀反轉的形狀，藉由將該一方的主面部與該一透鏡的透鏡面周圍側面接觸，將該另一方的主面部與該其他的透鏡的透鏡面周圍側面接觸，而進行該一方及該另一方的透鏡的定位，也進行這些各透鏡間相互的定位。The spacer ring of the second item of the patent application of the present invention is the spacer ring of the first item of the patent application, in which the main surface of one side and the other side are respectively a lens and a quilt to be arranged on one side. The shape of the surrounding side of the lens surface of the other lens arranged on the other side is reversed. By contacting the main surface of the one side with the surrounding side surface of the lens surface of the one lens, the main surface of the other side is contacted with the other lens surface. The side surface of the lens surface of the lens is in contact with each other, and the positioning of the one and the other lens is performed, and the mutual positioning of these lenses is also performed.

本發明的申請專利範圍第3項的間隔環，是如申請專利範圍第1或2項的間隔環，其中，由玻璃材料形成。The spacer ring of item 3 of the scope of patent application of the present invention is the spacer ring of item 1 or 2 of the scope of patent application, wherein it is formed of a glass material.

本發明的申請專利範圍第4項的透鏡系統，是具備：外周緣為圓形或是矩形的複數透鏡、及位在前述透鏡之中的一透鏡及與此透鏡相鄰接的其他的透鏡之間的間隔環，前述間隔環，是對應前述透鏡的外周緣的形狀地構成圓環狀或是矩形框狀，一方及另一方的主面部，是各別成為將被配置於一方側的前述一透鏡及被配置於另一方側的前述其他的透鏡的透鏡面周圍側的形狀反轉的形狀，將該一方的主面部與該一透鏡的透鏡面周圍側面接觸，將該另一方的主面部與該另一方的透鏡的透鏡面周圍側面接觸，而進行該一方及該另一方的透鏡的定位，也進行這些各透鏡間相互的定位。The fourth lens system of the patent application of the present invention is provided with: a plurality of lenses with a circular or rectangular outer periphery, and one of the aforementioned lenses and other lenses adjacent to this lens. The spacer ring, the spacer ring, is formed in an annular or rectangular frame shape corresponding to the shape of the outer periphery of the lens, and the main face of one and the other are respectively the one to be arranged on one side. The shape of the lens and the other lens arranged on the other side around the lens surface is inverted, the one main surface is in contact with the lens surface surrounding side of the one lens, and the other main surface is in contact with the surrounding side of the lens surface. The side surface around the lens surface of the other lens is in contact with each other, and positioning of the one and the other lens is performed, and the mutual positioning of these lenses is also performed.

本發明的申請專利範圍第5項的透鏡系統，是如申請專利範圍第4項的透鏡系統，其中，前述間隔環，是由玻璃材料形成。The lens system of the fifth item of the scope of patent application of the present invention is the lens system of the fourth item of the scope of patent application of the present invention, wherein the aforementioned spacer ring is formed of a glass material.

本發明的申請專利範圍第6項的間隔環的製造方法，是以成為定位對象的一或是二的透鏡的透鏡面為基準，使一方或是雙方的主面部形成將該透鏡面形狀反轉的形狀的平板體，在前述平板體的中央部分形成貫通孔而成為圓環狀或是矩形框狀。The manufacturing method of the spacer ring of the sixth item of the scope of patent application of the present invention is based on the lens surface of one or two lenses to be positioned, and the shape of the lens surface is reversed by forming one or both of the main surfaces A flat body having a shape of, a through hole is formed in the center portion of the flat body to be in the shape of an annular or rectangular frame.

本發明的申請專利範圍第7項的間隔環的製造方法，是如申請專利範圍第6項的間隔環的製造方法，其中，由玻璃材料形成。The manufacturing method of the spacer ring of the seventh patent application of the present invention is the manufacturing method of the spacer ring of the sixth patent application, in which it is formed of a glass material.

本發明的申請專利範圍第8項的透鏡系統的組裝方法，是以外周緣為圓形的一透鏡及與此一透鏡鄰接的其他的透鏡的透鏡面為基準，兩主面部是形成將前述各透鏡的透鏡面形狀反轉的形狀的平板體，前述一透鏡，依前述平板體及前述其他的透鏡的順序，將各個的透鏡面及前述平板體的主面部面接觸地重疊接合而作成疊層體，將前述疊層體的外周緣部磨削成為矩形狀，將前述疊層體分離成前述一透鏡、前述平板體及前述其他的透鏡，在前述平板體的中央部分形成貫通孔而成為矩形框狀的間隔環，前述一透鏡，依前述平板體及前述其他的透鏡的順序，將各個的透鏡面及前述間隔環的主面部面接觸地重疊。 [發明的效果]The method of assembling the lens system of the eighth item of the scope of patent application of the present invention is based on the lens surfaces of a lens with a circular outer periphery and other lenses adjacent to this lens, and the two main surfaces are formed by combining the aforementioned lenses A flat body with the shape of the lens surface reversed, the aforementioned one lens, in the order of the aforementioned flat body and the aforementioned other lenses, the respective lens surfaces and the main surface of the aforementioned flat body are superimposed and joined in contact with each other to form a laminated body The outer peripheral edge of the laminated body is ground into a rectangular shape, the laminated body is separated into the one lens, the flat plate, and the other lenses, and a through hole is formed in the center of the flat plate to form a rectangular frame The spacer ring in the shape of a lens, the aforementioned one lens, in the order of the flat plate body and the aforementioned other lenses, overlaps the respective lens surfaces and the main surface of the spacer ring in surface contact. [Effects of the invention]

在本發明中，間隔環，是至少一方的主面部，成為將定位對象的透鏡的透鏡面周圍側的形狀反轉的形狀，藉由將該主面部與該透鏡面周圍側面接觸，而進行該透鏡的定位。In the present invention, the spacer ring is at least one main surface, and has a shape that reverses the shape of the lens surface surrounding the lens to be positioned. This is performed by contacting the main surface with the lens surface surrounding side surface. Positioning of the lens.

即，本發明可以提供一種間隔環、透鏡系統、間隔環的製造方法及透鏡系統的組裝方法，透鏡系統的組裝不需要使用特殊的設備可容易地進行，且可以將透鏡中心間距離高精度地維持。That is, the present invention can provide a spacer ring, a lens system, a method of manufacturing the spacer ring, and a method of assembling the lens system. The assembly of the lens system can be carried out easily without the use of special equipment, and the distance between the lens centers can be accurately adjusted. maintain.

以下，對於本發明的實施例，參照圖面說明。Hereinafter, the embodiments of the present invention will be described with reference to the drawings.

[間隔環及透鏡系統] 第1圖，是使用本發明的間隔環組裝的透鏡系統的縱剖面圖。[Spacer ring and lens system] Figure 1 is a longitudinal sectional view of a lens system assembled using the spacer ring of the present invention.

本發明的間隔環1，是如第1圖所示，構成圓環狀或是矩形框狀，至少一方的主面部1a，是成為將被配置於一方側的透鏡2的透鏡面2a周圍側的形狀反轉的形狀，藉由將一方的主面部1a與透鏡面2a周圍側面接觸，而進行透鏡2的定位。The spacer ring 1 of the present invention is formed in an annular or rectangular frame shape as shown in Fig. 1, and at least one main surface 1a is to be arranged around the lens surface 2a of the lens 2 on one side. In the shape reversed, the lens 2 is positioned by contacting one main surface portion 1a with the peripheral side surface of the lens surface 2a.

將透鏡面2a周圍側的形狀反轉的形狀，是指與透鏡面2a周圍側的形狀相合的形狀，透鏡面2a周圍側形狀是凹的話為凸，透鏡面2a周圍側的形狀是凸的話為凹地反轉的形狀。這種形狀的關係，是模子及模子的關係。The shape that reverses the shape around the lens surface 2a is a shape that matches the shape around the lens surface 2a. If the shape around the lens surface 2a is concave, it is convex, and if the shape around the lens surface 2a is convex, it is Concave inverted shape. The relationship of this shape is the relationship between the mold and the mold.

此間隔環1，是成為定位對象的透鏡的周緣是圓形的情況時構成圓環狀，如後述透鏡的周緣是矩形的情況時，構成矩形框狀較佳。This spacer ring 1 is formed into an annular shape when the peripheral edge of the lens to be positioned is circular. For example, when the peripheral edge of the lens to be described later is rectangular, it is preferably formed into a rectangular frame shape.

此間隔環1，大多的情況，是位在2枚的透鏡之間，為了限定這些透鏡的相對位置關係而使用。即，此間隔環1，是如第1圖所示，一方及另一方的主面部1a、1b，是各別成為將被配置一方側的一透鏡2及於被配置於另一方側的其他的透鏡3的透鏡面2a、3a周圍側的形狀反轉的形狀，藉由將該一方的主面部1a與該一透鏡2的透鏡面2a周圍側面接觸，將該另一方的主面部1b與該其他的透鏡3的透鏡面3a周圍側面接觸，而進行該一方及該另一方的透鏡2、3的定位，也進行這些各透鏡2、3間相互的定位。In most cases, the spacer ring 1 is located between two lenses, and is used to limit the relative positional relationship of these lenses. That is, this spacer ring 1 is as shown in Figure 1. One and the other main surface 1a, 1b are respectively a lens 2 to be arranged on one side and another lens 2 to be arranged on the other side. The shape of the lens surfaces 2a and 3a of the lens 3 is inverted. By contacting the one main surface 1a with the peripheral side surface of the lens 2a of the one lens 2, the other main surface 1b and the other main surface 1b are inverted. The side surface around the lens surface 3a of the lens 3 is in contact with each other, and the positioning of the one and the other lenses 2 and 3 is performed, and the mutual positioning of the lenses 2 and 3 is also performed.

且此間隔環1及各透鏡2、3，是被收納於鏡筒4內而構成透鏡系統。進一步間隔環及透鏡的枚數若變多也同樣。In addition, the spacer ring 1 and the lenses 2 and 3 are housed in the lens barrel 4 to form a lens system. The same is true if the number of spacer rings and lenses increases.

鏡筒4的一端側(第1圖中左側)，是在開放端的內周部形成有凸緣7，開口部的內徑比最一端端的透鏡2的外徑更小。此凸緣7，是進行最一端端的透鏡2的鏡筒4的端部的定位。鏡筒4的另一端側(間隔環1及各透鏡2、3是***鏡筒4內的側)是開放端，螺栓環5被螺入，螺栓環5是將最另一端端的透鏡6推壓。與這些凸緣7及螺栓環5的透鏡2、6抵接的部分，是與間隔環1相同，成為對於透鏡2、6面接觸的形狀較佳。On one end side of the lens barrel 4 (left side in FIG. 1), a flange 7 is formed on the inner periphery of the open end, and the inner diameter of the opening is smaller than the outer diameter of the lens 2 at the end. This flange 7 is for positioning the end of the lens barrel 4 of the lens 2 at the most end. The other end side of the lens barrel 4 (the spacer ring 1 and each lens 2, 3 is the side inserted into the lens barrel 4) is an open end. The bolt ring 5 is screwed in, and the bolt ring 5 pushes the lens 6 at the other end. . The parts in contact with the lenses 2 and 6 of the flange 7 and the bolt ring 5 are the same as the spacer ring 1, and have a shape that preferably faces the lenses 2 and 6 in contact with each other.

此間隔環1，不會發生如習知的間隔環的由與透鏡的端緣部分抵接所產生的問題。因此，此間隔環，可以將各透鏡2、3間的空氣間隔正確地高精度地限制。This spacer ring 1 does not cause problems caused by the contact with the end edge of the lens as in the conventional spacer ring. Therefore, this spacer ring can accurately limit the air interval between the lenses 2 and 3 with high accuracy.

且在此間隔環1中，因為對於透鏡2、3面接觸，所以透鏡2、3即使與間隔環1壓接，透鏡2、3的變形和碎裂也可被抑制。In addition, in this spacer ring 1, since the lenses 2 and 3 are in surface contact, even if the lenses 2 and 3 are in pressure contact with the spacer ring 1, the deformation and chipping of the lenses 2 and 3 can be suppressed.

構成此間隔環1的材料，是金屬材料、合成樹脂(塑膠)材料、玻璃材料、陶瓷材料等，具有必要的剛性(不會藉由來自各透鏡2、3的按壓力而變形的程度的剛性)的材料的話，無特別限定。將間隔環1由玻璃材料形成的情況，由與構成透鏡2、3的光學材料的其中任一相同材料形成也可以，由不是光學材料的不透明的「結晶化玻璃」形成較佳。使用與構成透鏡2、3的光學材料的其中任一相同材料的話，熱膨脹率因為是成為與透鏡2、3的其中任一相同，所以較佳。且，將間隔環1由玻璃材料構成的情況時，可以應用透鏡的加工技術(由磨削及研磨，或是模具所產生的成型)。The material constituting the spacer ring 1 is a metal material, a synthetic resin (plastic) material, a glass material, a ceramic material, etc., and has the necessary rigidity (rigidity to the extent that it will not be deformed by the pressing force from the lenses 2 and 3) ) Is not particularly limited. When the spacer ring 1 is formed of a glass material, it may be formed of the same material as any of the optical materials constituting the lenses 2 and 3, and it is preferably formed of opaque "crystallized glass" that is not an optical material. If the same material as any of the optical materials constituting the lenses 2 and 3 is used, since the coefficient of thermal expansion becomes the same as that of any of the lenses 2 and 3, it is preferable. In addition, when the spacer ring 1 is made of a glass material, lens processing technology (grinding and polishing, or molding by a mold) can be applied.

且玻璃材料，是藉由如陶瓷材料，熱膨脹係數較低的材料構成間隔環1也較佳。例如，在平版印刷用的高精度透鏡系統中，為了防止熱膨脹和金屬(由殘留應力所產生的)經年變形的金屬框材料的熱處理是不可獲缺，但是由熱膨脹係數較低的材料將間隔環1構成的話，就可以實現不易受環境的熱而變化的強力的透鏡系統。In addition, it is also preferable that the glass material is made of a ceramic material and a material with a lower thermal expansion coefficient to form the spacer ring 1. For example, in a high-precision lens system for lithography, heat treatment of the metal frame material to prevent thermal expansion and metal (due to residual stress) from being deformed over the years is indispensable. If the ring 1 is configured, a powerful lens system that is not susceptible to changes due to environmental heat can be realized.

進一步，在此間隔環1中，也有如以下的效果。即，習知的間隔環，無法在透鏡接合使用，對於此，此間隔環1，可以將透鏡間的空氣間隔一邊高精度地維持，一邊與透鏡接合地使用。例如，在透鏡的組裝中在色像差的修正雖使用正負2枚的透鏡的組合，但是將這些接合的話性能可穩定，操作也變容易。Furthermore, this spacer ring 1 also has the following effects. That is, the conventional spacer ring cannot be used for lens cementing. For this, the spacer ring 1 can be used for cementing the lens while maintaining the air gap between the lenses with high accuracy. For example, in the assembly of the lens, a combination of plus and minus two lenses is used to correct the chromatic aberration, but when these are joined, the performance can be stabilized and the operation becomes easier.

將間隔環1接合在透鏡的情況時，有必要在間隔環1的側面形成空氣排出的孔或溝。儘管如此，因為偏芯和間隔誤差可以將緊要的透鏡塊體預先調整地固定，所以製造時的精度穩定的顯著效果可被預期。其與將透鏡黏著在框之後切削的習知方法比較的話，因為製造明顯成為容易，所以在對物透鏡的製造等中可以達成大幅的成本下降。When joining the spacer ring 1 to the lens, it is necessary to form a hole or groove for air discharge on the side surface of the spacer ring 1. Nevertheless, because the eccentricity and spacing error can pre-adjust and fix the critical lens block, a significant effect of stable precision during manufacturing can be expected. Compared with the conventional method in which the lens is adhered to the frame and then cut, the manufacturing is significantly easier, so a significant cost reduction can be achieved in the manufacturing of the objective lens.

[間隔環的製造方法] 第2圖，是本發明的間隔環的縱剖面圖。[Manufacturing method of spacer ring] Fig. 2 is a longitudinal sectional view of the spacer ring of the present invention.

如第2圖所示，將如前述的間隔環1、8製造時，首先，以成為定位對象的一或是二的透鏡的透鏡面為基準，一方或是雙方的主面部1a、1b、8a、8b，是作成將該透鏡面形狀反轉的形狀的平板體9、10(又，在此雖說明為2個間隔環1、8，但是製造是每次進行1個)。此平板體9、10的中心厚度，是與成為定位對象的透鏡的透鏡面間隔一致。As shown in Figure 2, when manufacturing the spacer rings 1, 8 as described above, first, one or both of the main surfaces 1a, 1b, 8a are based on the lens surface of the one or two lenses to be positioned. , 8b are flat plates 9 and 10 formed in a shape that reverses the shape of the lens surface (in addition, although two spacer rings 1 and 8 are described here, the production is performed one at a time). The center thickness of the flat plates 9 and 10 corresponds to the distance between the lens surfaces of the lens to be positioned.

作成這種平板體9、10時，可以將成為定位對象的透鏡本身作為模子(的一部分)使用，藉由射出成型和沖壓成型而作成。即使沒有使用透鏡本身，將藉由將其透鏡成型用的模子成型的不同構件作為模子使用也可以。When making such flat bodies 9, 10, the lens itself to be the positioning target can be used as (a part of) a mold, and it can be made by injection molding and press molding. Even if the lens itself is not used, a different member molded by a mold for molding the lens may be used as a mold.

形成這種平板體9、10的材料，是如前述，可以使用各種的材料。The materials for forming such flat bodies 9 and 10 are as described above, and various materials can be used.

接著，藉由在平板體9、10的中央部分形成貫通孔11、12，作成圓環狀或是矩形框狀，就可以製造間隔環1、8。貫通孔11、12的周圍側的兩主面部1a、1b、8a、8b，是將成為定位對象的透鏡的透鏡面周圍側的形狀反轉的形狀的面所殘餘者。Next, by forming the through holes 11, 12 in the center portions of the flat bodies 9, 10, and making them into a circular ring shape or a rectangular frame shape, the spacer rings 1, 8 can be manufactured. The two main surface surfaces 1a, 1b, 8a, and 8b on the peripheral side of the through holes 11, 12 remain the surfaces of the shape inverted on the peripheral side of the lens surface of the lens to be positioned.

[透鏡系統的組裝方法] 接著說明，將由複數矩形狀的透鏡所構成的透鏡系統組裝用的本發明的透鏡系統的組裝方法。[Assembly method of lens system] Next, an assembling method of the lens system of the present invention for assembling a lens system composed of a plurality of rectangular lenses will be described.

現在一般所使用的光學系，大多數是由以外周緣為圓形的透鏡及圓筒形的鏡筒為基本的保持零件所構成。這是因為在外周緣是具有矩形狀等的圓形以外的形狀的透鏡中，精度高的組裝是困難。但是，攝像元件和畫像顯示畫面(顯示器)不必要是矩形狀，攝像透鏡和投影透鏡不必要是外周緣為圓形。例如，在立體攝影等中，在將複數攝像元件儘可能接近配置的要求中，在圓形透鏡中具有界限。Most of the optical systems generally used today consist of a lens with a circular outer periphery and a cylindrical lens barrel as basic holding parts. This is because it is difficult to assemble with high accuracy in a lens having a shape other than a circular shape such as a rectangular shape on the outer periphery. However, the image pickup element and the image display screen (display) need not be rectangular, and the image pickup lens and projection lens need not have a circular outer periphery. For example, in stereo photography and the like, there is a limit in the circular lens in the requirement to arrange plural imaging elements as close as possible.

在此，在本發明中提案，應用前述的間隔環，使用將透鏡間的空氣間隔由玻璃等的物體埋沒的手法，進行使外周緣形成圓形以外的形狀的透鏡間的空氣間隔的精度維持和光軸對位良好的組裝方法。Here, it is proposed in the present invention to apply the aforementioned spacer ring and use a technique in which the air space between the lenses is buried with an object such as glass to maintain the accuracy of the air space between the lenses whose outer periphery is formed into a shape other than a circle. The assembly method is well aligned with the optical axis.

第3圖，是說明本發明的透鏡系統的組裝方法的前視圖及縱剖面圖。Fig. 3 is a front view and a longitudinal sectional view illustrating the method of assembling the lens system of the present invention.

第4圖，是說明本發明的透鏡系統的組裝方法的前視圖、俯視圖及側面圖。Fig. 4 is a front view, a plan view, and a side view illustrating the method of assembling the lens system of the present invention.

在此透鏡系統的組裝方法中，首先，如第3圖(a)所示，準備外周緣為圓形的複數透鏡13、14、15。且，如第3圖(b)所示，將對應複數透鏡13、14、15的規定的空氣間隔的形狀的平板體16、17作成。這些平板體16、17，其兩主面部，是將透鏡13、14、15的透鏡面形狀反轉的形狀，與前述的間隔環的製造過程中的平板體同樣。這些平板體16、17的材料，是如前述，可以使用合成樹脂材料和金屬材料、玻璃材料等的各種者。In the method of assembling this lens system, first, as shown in Fig. 3(a), plural lenses 13, 14, 15 having a circular outer periphery are prepared. And, as shown in FIG. 3(b), the flat plate bodies 16, 17 of the shape corresponding to the predetermined air space of the plural lenses 13, 14, and 15 are made. The two main surfaces of these flat plates 16 and 17 are shaped inverted from the shape of the lens surfaces of the lenses 13, 14, and 15 and are the same as the flat plates in the manufacturing process of the spacer ring described above. The materials of these flat bodies 16 and 17 are as described above, and various materials such as synthetic resin materials, metal materials, and glass materials can be used.

且如第3圖(c)所示，將各透鏡13、14、15及各平板體16、17由規定的順序重疊，將各透鏡13、14、15的透鏡面及平板體16、17的主面部面接觸地接合而接合，作成疊層體18。在此接合中，可以使用熱可塑性的黏著劑(接合劑)。And as shown in Figure 3(c), the lenses 13, 14, 15 and the flat plates 16, 17 are superimposed in a predetermined order, and the lens surfaces of the lenses 13, 14, 15 and the flat plates 16, 17 The main surface is joined in contact with each other to form a laminate 18. In this bonding, a thermoplastic adhesive (bonding agent) can be used.

接著，將疊層體18的外周緣磨削加工，將各透鏡13、14、15及各平板體16、17的外周緣，由疊層體18的狀態直接加工成矩形狀。在此，各透鏡13、14、15及各平板體16、17，是不接合而各將外周緣加工成矩形狀也可以，但是由疊層體18加工的話，可以使各個的形狀一致，從加工工時的點考慮的話較佳。Next, the outer periphery of the laminated body 18 is ground, and the outer periphery of each lens 13, 14, 15 and each flat plate 16, 17 is directly processed into a rectangular shape from the state of the laminated body 18. Here, each of the lenses 13, 14, 15 and each of the flat plates 16, 17 may be processed into a rectangular shape without joining the outer periphery, but if processed from the laminated body 18, the shapes of each can be made uniform. It is better to consider the point of processing man-hours.

且將疊層體18分離成各透鏡13、14、15及各平板體16、17。各透鏡13、14、15，是如第4圖(a)所示，外周緣是成為矩形狀。And the laminated body 18 is separated into the lenses 13, 14, 15 and the flat plates 16, 17 respectively. As shown in Fig. 4(a), each lens 13, 14, 15 has a rectangular outer periphery.

各平板體16、17，是如第4圖(b)所示，在中央部分形成貫通孔而作成矩形框狀的間隔環也可以，只有將其一部分作為隔件使用也可以。其中任一的情況，皆將與各透鏡13、14、15的透鏡面面接觸的主面部的至少一部分殘留。As shown in FIG. 4(b), each of the flat plates 16 and 17 may have a through hole formed in the center to form a rectangular frame-shaped spacer ring, and only a part of it may be used as a spacer. In either case, at least a part of the main surface surface contacting the lens surface of each lens 13, 14, 15 remains.

且如第4圖(c)所示，從各透鏡13、14、15及各平板體16、17形成的隔件或是間隔環，是使各個的透鏡面及主面部面接觸並由規定的順序重疊。此時，各透鏡13、14、15及各隔件或是間隔環，是固定在基板材料(基座)19上也可以。And as shown in Fig. 4(c), the spacers or spacer rings formed from the lenses 13, 14, 15 and the flat plates 16, 17 contact each lens surface and the main surface and are defined by The order overlaps. At this time, each lens 13, 14, 15 and each spacer or spacer ring may be fixed to the substrate material (base) 19.

又，在此說明中雖顯示3枚構成的透鏡系統，但是透鏡的構成枚數並無特別限定。In addition, although a three-piece lens system is shown in this description, the number of lenses is not particularly limited.

如此被組裝的透鏡系統，可以較佳使用於3D顯示器等投影光學系的光學系單元的堆疊、和必須將中心間距離接近的立體視光學系。且，也可以應用在為了將物體面和像面傾斜所使用的「沙氏光學系」的偏軸透鏡配置。The lens system assembled in this way can be preferably used for stacking of optical system units of projection optical systems such as 3D displays, and for stereoscopic optical systems where the distance between centers must be close. In addition, it can also be applied to the off-axis lens arrangement of the "Sample Optical System" used to tilt the object plane and the image plane.

1，8:間隔環 1a，1b，8a，8b:主面部 2，3，6:透鏡 2a，3a:透鏡面 4:鏡筒 5:螺栓環 7:凸緣 9，10:平板體 11，12:貫通孔 13，14，15:透鏡 16，17:平板體 18:疊層體 101:透鏡 102:間隔環 103:金屬盤 104:鏡筒1, 8: Spacer ring 1a, 1b, 8a, 8b: main face 2, 3, 6: lens 2a, 3a: lens surface 4: Lens tube 5: Bolt ring 7: flange 9, 10: flat body 11, 12: Through hole 13, 14, 15: lens 16, 17: flat body 18: laminated body 101: lens 102: Spacer ring 103: metal plate 104: lens barrel

[第1圖] 使用本發明的間隔環組裝的透鏡系統的縱剖面圖。 [第2圖] 本發明的間隔環的縱剖面圖。 [第3圖] 說明本發明的透鏡系統的組裝方法的前視圖及縱剖面圖。 [第4圖] 說明本發明的透鏡系統的組裝方法的前視圖、俯視圖及側面圖。 [第5圖] 使用習知的間隔環組裝的透鏡系統的縱剖面圖。 [第6圖] 習知的高精度透鏡系統的縱剖面圖。[Figure 1] A longitudinal sectional view of a lens system assembled using the spacer ring of the present invention. [Figure 2] A longitudinal cross-sectional view of the spacer ring of the present invention. [Figure 3] A front view and a longitudinal sectional view illustrating the method of assembling the lens system of the present invention. [Fig. 4] A front view, a top view, and a side view explaining the method of assembling the lens system of the present invention. [Figure 5] A longitudinal sectional view of a lens system assembled using a conventional spacer ring. [Figure 6] A longitudinal sectional view of a conventional high-precision lens system.

1，8:間隔環 1, 8: Spacer ring

1a，1b:主面部 1a, 1b: main face

2，3，6:透鏡 2, 3, 6: lens

2a，3a:透鏡面 2a, 3a: lens surface

4:鏡筒 4: Lens tube

5:螺栓環 5: Bolt ring

7:凸緣 7: flange

Claims (8)

一種間隔環，其特徵為： 構成圓環狀或是矩形框狀，至少一方的主面部是成為將被配置於一方側的透鏡的透鏡面周圍側的形狀反轉的形狀，藉由將該一方的主面部與該透鏡面周圍側面接觸，而進行該透鏡的定位。A spacer ring, which is characterized by: In the shape of a circular ring or a rectangular frame, at least one main face is a shape that reverses the shape of the lens surface surrounding the lens arranged on one side, and the one main face and the periphery of the lens surface Side contact, and positioning of the lens. 如申請專利範圍第1項的間隔環，其中， 一方及另一方的主面部，是各別成為將被配置於一方側的一透鏡及被配置於另一方側的其他的透鏡的透鏡面周圍側的形狀反轉的形狀，藉由將該一方的主面部與該一透鏡的透鏡面周圍側面接觸，將該另一方的主面部與該其他的透鏡的透鏡面周圍側面接觸，而進行該一方及該另一方的透鏡的定位，也進行這些各透鏡間相互的定位。For example, the spacer ring of item 1 in the scope of patent application, in which, The main surface of one side and the other side are respectively in the shape of a lens arranged on one side and the other lens arranged on the other side of the lens surface surrounding the shape inverted, by this one side The main surface is in contact with the side surface around the lens surface of the one lens, the other main surface is in contact with the side surface around the lens surface of the other lens, and the positioning of the one and the other lenses is performed, and these lenses are also performed Mutual positioning. 如申請專利範圍第1或2項的間隔環，其中， 由玻璃材料形成。For example, the spacer ring of item 1 or 2 of the scope of patent application, in which, Made of glass material. 一種透鏡系統，其特徵為，具備： 外周緣為圓形或是矩形的複數透鏡、及 位在前述透鏡之中的一透鏡及與此透鏡相鄰接的其他的透鏡之間的間隔環， 前述間隔環，是對應前述透鏡的外周緣的形狀地構成圓環狀或是矩形框狀，一方及另一方的主面部，是各別成為將被配置於一方側的前述一透鏡及被配置於另一方側的前述其他的透鏡的透鏡面周圍側的形狀反轉的形狀，將該一方的主面部與該一透鏡的透鏡面周圍側面接觸，將該另一方的主面部與該另一方的透鏡的透鏡面周圍側面接觸，而進行該一方及該另一方的透鏡的定位，也進行這些各透鏡間相互的定位。A lens system, which is characterized by having: A complex lens with a circular or rectangular outer periphery, and The spacer ring between one lens among the aforementioned lenses and other lenses adjacent to this lens, The spacer ring is formed in an annular shape or a rectangular frame shape corresponding to the shape of the outer periphery of the lens, and the main surface of one and the other are respectively the one lens to be arranged on one side and the lens arranged on the one side. The shape of the other lens on the other side around the lens surface is inverted, the one main surface is in contact with the side surface surrounding the lens of the one lens, and the other main surface is in contact with the other lens The peripheral side of the lens surface of the lens is in contact with each other, and positioning of the one and the other lens is performed, and the mutual positioning of these lenses is also performed. 如申請專利範圍第4項的透鏡系統，其中， 前述間隔環，是由玻璃材料形成。Such as the lens system of item 4 in the scope of patent application, in which, The aforementioned spacer ring is formed of a glass material. 一種間隔環的製造方法，其特徵為： 以成為定位對象的一或是二的透鏡的透鏡面為基準，使一方或是雙方的主面部形成將該透鏡面形狀反轉的形狀的平板體， 在前述平板體的中央部分形成貫通孔而成為圓環狀或是矩形框狀。A method for manufacturing a spacer ring, which is characterized by: Using the lens surface of one or two lenses to be the positioning target as a reference, one or both of the main surfaces are formed into a flat plate with a shape that reverses the shape of the lens surface, A through hole is formed in the central part of the flat plate body to have a circular ring shape or a rectangular frame shape. 如申請專利範圍第6項的間隔環的製造方法，其中， 由玻璃材料形成。For example, the manufacturing method of the spacer ring of item 6 of the scope of patent application, in which, Made of glass material. 一種透鏡系統的組裝方法，其特徵為： 以外周緣為圓形的一透鏡及與此一透鏡鄰接的其他的透鏡的透鏡面為基準，形成兩主面部是將前述各透鏡的透鏡面形狀反轉的形狀的平板體， 前述一透鏡，依前述平板體及前述其他的透鏡的順序，將各個的透鏡面及前述平板體的主面部面接觸地重疊接合而作成疊層體， 將前述疊層體的外周緣部磨削成為矩形狀， 將前述疊層體分離成前述一透鏡、前述平板體及前述其他的透鏡， 在前述平板體的中央部分形成貫通孔而成為矩形框狀的間隔環， 前述一透鏡，依前述平板體及前述其他的透鏡的順序，將各個的透鏡面及前述間隔環的主面部面接觸地重疊。A method for assembling a lens system, which is characterized by: A lens with a circular outer periphery and the lens surfaces of other lenses adjacent to this lens are used as a reference, and two main surfaces are formed as flat plates in which the shape of the lens surface of each lens is inverted. In the aforementioned one lens, in the order of the aforementioned flat body and the aforementioned other lenses, the respective lens surfaces and the main surface of the aforementioned flat body are superposed and joined in contact with each other to form a laminated body, Grind the outer peripheral edge of the aforementioned laminated body into a rectangular shape, Separating the aforementioned laminated body into the aforementioned one lens, the aforementioned flat body, and the aforementioned other lenses, A through hole is formed in the central portion of the flat plate body to form a rectangular frame-shaped spacer ring, In the aforementioned one lens, in the order of the aforementioned flat body and the aforementioned other lenses, the respective lens surfaces and the main surface of the spacer ring are superimposed in surface contact.
TW108128451A 2019-08-12 2019-08-12 Spacer ring, lens system, method for manufacturing spacer ring, and method for assembling lens system in which the spacer ring has a main surface that is shaped as a reverse of a shape of a peripheral portion of a lens surface of a lens TW202107136A (en)

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