TWM626197U - Lens detecting device - Google Patents

Abstract

The present disclosure relates to a lens detecting device and a lens assembly. The lens detecting device has a support frame, a pattern generating device and a lens assembly, wherein the lens assembly receives a first pattern beam from the pattern generating device with the first end thereof, and generates a second pattern spot at the second end thereof to serve as the detection image of the lens to be tested. There is a working distance ranged from 1~50 millimeter between the second pattern spot and the lens assembly. In addition, there is a light path which has numerical aperture ranged from 0.4~1 between the second pattern spot and the second end of the lens assembly. The second pattern spot generated by the lens detecting device can be used as detection image of the lens to be tested, which can extend the distance between the holder of the lens detecting device and the pattern generating device. Therefore, the problem of damage caused by collision between devices in the lens detecting device can be prevented.

Description

Lens detection device

The present invention relates to a lens detection device and a lens module, in particular to a lens detection device and a lens module that can generate a second pattern light spot as a detection image of the lens to be tested, wherein the second pattern light spot and the lens module There is an optical path between the second ends, and has a working distance of 1~50 mm, and the optical path has a numerical aperture of 0.4~1.

With the development of science and technology, many industries have increasingly stringent requirements for optical lens specifications. When the lens size is getting smaller and smaller, the traditional lens inspection methods and devices have also begun to be inspected for bottlenecks. For example, when the lens to be tested is to be tested for modulation transfer function (MTF), one of the traditional detection methods is the orthographic detection method. The method is that the pattern generation device of the lens detection device can provide a pattern The light spot emits a pattern beam on the imaging surface of the lens under test. Further, the lens under test provides the light beam to an image sensor (eg, a camera), so that the image sensor can obtain an image, and the image can be further analyzed to obtain an image. Check the quality of the lens (eg, resolution, contrast).

As the size of the lens is getting smaller and smaller, the inherent lens detection equipment may no longer be suitable for small-sized lenses. Please refer to Figure 1. Figure 1 is a conventional lens detection device and a small-sized lens to be tested. The schematic diagram of the lens, as shown in FIG. 1 , is used to provide a pattern when a small-sized lens to be tested 102 is installed in a conventional lens detection device 101 and the imaging surface of the lens to be tested 102 is located in the through hole 1012 of the stage 1011 The pattern generating device 103 of the light spot 1032 and the pattern beam 1031 must probe into the through hole 1012 to detect the lens to be tested 102 . However, in this case, the pattern generating device 103 of the conventional lens detection device 101 may easily collide with the stage 1011 and cause damage to the equipment.

Therefore, in order to overcome the deficiencies of the prior art, the present invention provides a lens detection device and a lens module thereof. The lens module can form a second pattern light spot as a detection image of the lens to be tested after receiving the first pattern beam generated by the pattern generating device, so as to lengthen the distance between the stage in the lens detection device and the pattern generating device. distance and reduce the chance of equipment damage.

Based on at least one of the foregoing objectives, the lens detection device provided by the novel embodiment includes a frame, a pattern generating device, and a lens module. The pattern generating device is arranged on the frame and is used for generating a first pattern light spot and a first pattern light beam. The lens module has a first end and a second end, and is arranged on the frame body and is located on one side of the pattern generating device, and is between the pattern generating device and the lens to be tested, wherein the first end of the lens module is The first pattern light beam generated by the pattern generating device is received, and a second pattern light spot is generated through the second end to provide the lens to be tested as a detection image. The light path between the second end of the lens module of the lens detection device and the second pattern light spot has a working distance of 1-50 millimeters (mm).

Optionally, the lens module is a relay lens or two objective lenses.

Optionally, when the lens module is a dual objective lens, the sizes of the two objective lenses are different.

Optionally, the optical path has a numerical aperture, and the numerical aperture is 0.4-1.

Based on at least one of the foregoing objectives, the lens detection device provided by the novel embodiment includes a frame, a pattern generating device, and a lens module. The pattern generating device is arranged on the frame and is used for generating a first pattern light spot and a first pattern light beam. The lens module has a first end and a second end, and is arranged on the frame body and is located on one side of the pattern generating device, and is between the pattern generating device and the lens to be tested, wherein the first end of the lens module is The first pattern light beam generated by the pattern generating device is received, and a second pattern light spot is generated through the second end to provide the lens to be tested as a detection image. The optical path between the second end of the lens module of the lens detection device and the second pattern light spot has a numerical aperture of 0.4-1.

Optionally, the lens module is a relay lens or two objective lenses.

Optionally, when the lens module is a dual objective lens, the sizes of the two objective lenses are different.

Based on at least one of the foregoing objectives, a lens module for a lens detection device provided by the novel embodiment includes two objective lenses to form a relay lens, and the lens module has a first end and a second end . The first end is used to receive the first pattern light beam generated by the pattern generating device of the lens detection device, and generate a second pattern light spot through the second end to provide the lens to be tested as a detection image. The light path between the second end of the lens module and the second pattern light spot has a working distance of 1-50 mm.

Based on at least one of the foregoing objectives, a lens module for a lens detection device provided by the novel embodiment includes two objective lenses to form a relay lens, and the lens module has a first end and a second end . The first end is used to receive the first pattern light beam generated by the pattern generating device of the lens detection device, and generate a second pattern light spot through the second end to provide the lens to be tested as a detection image. The optical path between the second end of the lens module and the second pattern light spot has a numerical aperture of 0.4-1.

In short, the lens detection device and the lens module provided by the new embodiment can generate a second pattern light spot (ie, a detection image used for detecting the lens to be tested), and the second pattern light spot and the lens module There is a distance between them, which can prevent the lens module from being inserted into the through hole of the lens detection device's carrier when testing the lens to be tested, so as to avoid or reduce the damage caused by the collision of the equipment. It is advantageous to detect various markets in need (eg, camera optical lens market, optical lens market for under-screen fingerprint recognition, or other optical lens markets).

In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, a detailed description is made as follows in conjunction with the accompanying drawings.

101: Traditional lens detection device

1011, 2011: Stage

1012: Through hole

102, 202: Lens to be tested

103, 203: Pattern generation device

1031: Pattern Beam

1032: Pattern spot

2: Lens detection device

201: Lens Module

2012: Object Lens

2031: First Pattern Beam

204: Frame

E201: First End

E202: Second End

P201: The first pattern spot

P202: The second pattern light spot

WK: working distance

θ: receiving angle

FIG. 1 is a schematic diagram of a conventional lens detection device and a small-sized lens to be tested.

FIG. 2 is a schematic diagram of a lens detection device according to a new embodiment of the present invention.

In order to fully understand the purpose, features and effects of the present invention, the present invention will be described in detail through the following specific embodiments and the accompanying drawings. The description is as follows.

The novel embodiment provides a lens detection device, which has a frame body, a pattern generating device, and a lens module. The lens module can be a relay lens composed of two objective lenses, and is used to receive the first pattern light spot and the first pattern light beam generated by the pattern generating device, and form and project the second pattern light spot to the lens to be tested. As a detection image, thereby replacing the traditional first pattern light spot directly used as a detection image. There is an optical path between the second pattern light spot and the second end of the lens module, and the working distance of the light path (that is, the distance between the second pattern light spot and the second end of the lens module) is between 1 and 50 km. centimeters, And the numerical aperture of the optical path is between 0.4 and 1. Compared with the traditional lens detection device, there is a distance between the detection image (the second pattern light spot) provided by the lens detection device of the present invention and the lens module, which can extend the distance between the various devices of the lens detection device (For example, the distance between the pattern generating device and the stage on which the lens to be tested is placed, and the distance between the lens module and the stage on which the lens to be tested is placed), so as to reduce the damage rate of the collision between the devices, thereby reducing the lens detection time. cost.

First, please refer to FIG. 2 . FIG. 2 is a schematic diagram of a lens detection device according to a new embodiment of the present invention. As shown in FIG. 2 , the lens detection device 2 includes a lens module 201 , a pattern generating device 203 and a frame body 204 . The frame body 204 is used for fixing the lens module 201 and arranging the pattern generating device 203 , so that the lens module 201 is located on one side of the pattern generating device 203 . In this new embodiment, the lens module 201 is located on the side of the pattern generating device 203 . The upper side, but the present invention is not limited by this, and is not limited by the type of appearance of the frame body 204 . When the lens detection device 2 is used to detect the lens to be tested 202 , the lens module 201 is located between the pattern generation device 203 and the lens to be tested 202 .

The pattern generating device 203 is used for generating a first pattern light spot P201 and a first pattern light beam 2031 , and further generates a second pattern light spot P202 through the lens module 201 as a detection pattern of the lens under test 202 . The lens module 201 has a first end E201 and a second end E202 , which may be a relay lens composed of two objective lenses 2012 . The first end E201 of the lens module 201 can receive the first pattern light spot P201 and the first pattern light beam 2031 generated by the pattern generating device 203 , and generate a second pattern light spot P202 at the second end E202 for detecting the lens under test 202 pattern, wherein there is a distance between the second pattern light spot P202 and the lens module 201, so that the distance between the lens module 201 providing the detection pattern and the lens to be tested 202 can be effectively extended to prevent collisions between devices. The extremely short distance between the pattern generating device 103 and the pattern light spot 1032 is different from the conventional lens detection device (FIG. 1). When the lens module 201 is composed of two When two objective lenses 2012 are combined or a relay lens, the light projected by the lens module 201 can be close to parallel light. Therefore, any object capable of projecting nearly parallel light should be covered by this new model. scope. When the lens module 201 is composed of two objective lenses 2012, the dimensions of the two objective lenses 2012 can be the same or different. Through the combination of the same or different two objective lenses 2012, the The magnification effect of different magnifications.

There is an optical path between the second pattern light spot P202 generated by the lens module 201 and the second end E202 of the lens module 201 , and the optical path has a working distance WK of 1-50 mm. Furthermore, the light path has a light-receiving angle θ, and the light-receiving angle θ can be calculated to obtain a numerical aperture (NA). Numerical aperture is a dimensionless number used to measure the angular range of light that can be collected by an optical system. The definition and calculation formula of numerical aperture is NA=n sinθ, where n is the refractive index of the medium, and θ in this new model is Receiving angle θ. The numerical aperture of the optical path between the second end E202 of the lens module 201 and the second pattern light spot P202 in the lens detection device 2 of the present invention is 0.4-1.

Based on the above, compared with the prior art, the technical effects of the lens detection device and the lens module according to the new embodiment are described as follows.

In the prior art, there is only a very short distance between the detection pattern generated by the pattern generating device, so that in the process of detecting the lens, it is often necessary to probe the pattern generating device into the through hole of the stage on which the lens to be tested is loaded. This makes the device vulnerable to collision and damage. Furthermore, when multiple lenses to be tested are set at the same time on the stage loaded with the lens to be tested, when measuring different lenses to be tested continuously, the stage needs to be moved vertically first (if the stage is directly moved in parallel, it will cause the equipment to collide) However, the detection action is increased and the detection efficiency is not high. On the other hand, in the lens detection device and the lens module of the present invention, the second pattern light spot can be generated by the lens module as the detection image, wherein there is a distance between the detection image and the lens module, so that the detection process can be effectively extended. The distance between the stage on which the lens to be tested is loaded and the lens module, that is, the lens module that generates the test image There is no need to probe into the through hole of the carrier to avoid equipment collision and damage. Furthermore, when a plurality of lenses to be tested are installed on the stage, when different lenses are continuously measured, the stage can be directly moved horizontally to effectively improve the testing efficiency.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the above embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to those of the foregoing embodiments should be set to be included within the scope of the present invention.

2: Lens detection device

201: Lens Module

2011: Stage

2012: Object Lens

2031: First Pattern Beam

204: Frame

E201: First End

E202: Second End

P201: The first pattern spot

P202: The second pattern light spot

WK: working distance

θ: receiving angle

Claims (7)

A lens detection device, comprising: a frame body; a pattern generating device arranged on the frame body to generate a first pattern light spot and a first pattern beam; and a lens module having a first end and a The second end is disposed on the frame and is located on one side of the pattern generating device, and is between the pattern generating device and a lens to be tested, and the first end of the lens module is used for receiving the pattern generating device The first pattern beam generated by the device generates a second pattern light spot through the second end to provide the lens to be tested as a detection image; wherein the second end of the lens module and the second pattern light spot are between The optical path has a working distance of 1 to 50 millimeters (mm). The lens detection device of claim 1, wherein the lens module is a relay lens or two objective lenses. The lens detection device according to claim 2, wherein when the lens module is two objective lenses, the sizes of the objective lenses are different. The lens detection device of claim 1, wherein the optical path has a numerical aperture, and the numerical aperture is 0.4-1. A lens detection device, comprising: a frame body; a pattern generating device disposed on the frame body for generating a first pattern light spot and a first pattern beam; and A lens module, which has a first end and a second end, is disposed on the frame and is located on one side of the pattern generating device, and is interposed between the pattern generating device and a lens to be tested, the lens module The first end of the group is used to receive the first pattern beam generated by the pattern generating device, and generate a second pattern light spot through the second end to provide the lens to be tested as a detection image; wherein the lens detection device has a The optical path between the second end of the lens module and the second pattern light spot has a numerical aperture, and the numerical aperture is 0.4-1. The lens detection device according to claim 5, wherein the lens module is a relay lens or two objective lenses. The lens detection device according to claim 6, wherein when the lens module is two objective lenses, the sizes of the objective lenses are different.

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