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Wafer lens, layered lens array, and endoscope
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A technology of wafer lens and lens array, applied in endoscope, telescope, diagnosis and other directions, can solve the problems of endoscope limit, reduction of optical image resolution, deterioration of optical lens convergence, etc., and achieve low cost and simple structure Effect
Pending Publication Date: 2021-01-01
OLYMPUS CORP
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[0010] However, since the optical lens unit has the function of converging the light from the object to be observed, when the diameter of the optical lens unit is reduced, the converging performance of the optical lens deteriorates, and the optical image formed by the optical lens unit may be reduced. The resolution of such problematic points
Therefore, when only the structure of the conventional laminated lens array is used, there is a limit in reducing the diameter of the distal end portion of the endoscope.
Method used
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no. 1 Embodiment approach
[0040] First, before describing in detail the laminated lens array of the first embodiment of the present invention, the following uses figure 1 , figure 2 , mainly explaining the schematic structure of an endoscope to which this laminated lens array is applied.
[0041] figure 1 , figure 2 A diagram showing a schematic configuration of an endoscope to which a laminated lens array according to each embodiment of the present invention is applied. in,figure 1 is an external view of the endoscope. also, figure 2 is will be from figure 1 View in the direction of the arrow [2] shown figure 1 An enlarged perspective view of main parts showing the state of the front end of the endoscope.
[0042] Such as figure 1 As shown, the endoscope 1 to which the laminated lens array according to each embodiment of the present invention is applied mainly includes an insertion unit 2 , an operation unit 3 , a universal cable 4 , an endoscope connector 5 and the like.
[0043] The inse...
no. 2 Embodiment approach
[0089] In the endoscope 1 of the first embodiment described above, as Figure 8 As shown, the illumination light transmitted through the light guidefiber bundle 111 for illumination is configured so that it passes through the second window 103 of the multilayer lens array 106 and is emitted from the front surface of the second window 103 toward the front.
[0090] In this case, in the configuration of the endoscope 1 according to the first embodiment described above, the front surface (second end surface) of the laminated lens array 106 including the second window 103 is covered with the cover member 112 . Since the cover member 112 is formed of a transparent resin material or the like, the illumination light emitted from the second window 103 passes through the cover member 112 and is irradiated forward.
[0091] At this time, depending on the situation, such as Figure 8 The outgoing light shown by the arrow L1 is sometimes reflected on the front surface 112a of the cover ...
no. 3 Embodiment approach
[0101] In the above-mentioned second embodiment, the example in which the second light shielding portion 113 and the third window 114 for suppressing generation of harmful light (flare) are provided in the cover member 112A is shown. The structure is not limited to this illustration. The third embodiment described below is another structural example of the structure for suppressing flare.
[0102] Figure 11 , Figure 12 It is a diagram showing a configuration example of an endoscope according to a third embodiment of the present invention. in, Figure 11 is an exploded view of the main parts, Figure 12 is the assembly drawing.
[0103] The basic structure of this embodiment is substantially the same as that of the above-mentioned first embodiment and second embodiment. In the endoscope of this embodiment, the structure of the laminated lens array 106B as a laminated optical component is slightly different, and the structure of the cover member 112B held to cover the la...
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Abstract
The purpose of the present invention is to provide an endoscope with a reduced diameter. To this end, this endoscope comprises: an optical member (106) in which a plurality of plate-shape members (104) are fixed, the plurality of plate-shaped members being layered coaxially and each comprising a first window (101) through which light that forms an optical image is transmitted, a first light shielding part (102) which is formed on the outer circumference of the first window, and a second window (103) which is formed on the outer circumferential side of the first light shielding part and throughwhich illumination light is transmitted; and a cover member (112A) comprising an imaging part (110) which is disposed opposing the first window at a first end of the optical member and by which the optical image is formed, an illumination part (111) which is disposed opposing the second window on the outside in the outer circumferential direction of the imaging part and which emits the illumination light, a third window (114) corresponding to the first window on the side of a second end opposite the first end, and a second light shielding part (113) which is formed on the inner circumferential edge of the third window and which corresponds to the first light shielding part, the cover member being configured to surround the outer circumferential surface of the optical member such that thethird window and the second light shielding part are disposed at a position opposing the second end of the optical member.
Description
technical field [0001] The present invention relates to a wafer lens in which a plurality of optical elements are arranged side by side on a plane, a laminated lens array formed by cutting out a laminated waferlens array for each predetermined area, and application of the laminated lens array to imaging optical systems and illumination optics In the endoscope of the system, the laminated wafer lens array is formed by laminating a plurality of wafer lenses in the direction of the optical axis and fixing them with an adhesive material. Background technique [0002] Conventionally, endoscopes having an insertion portion in the shape of an elongated tube have been widely used in, for example, medical fields and industrial fields. Among them, the medical endoscope used in the medical field is configured such that an insertion portion can be inserted into a body cavity of a living body to observe organs, or the endoscope can be inserted into a treatment instrument insert if neces...
Claims
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Application Information
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