TWM585351U - Testing device - Google Patents

Abstract

A testing device for testing an optical device is disclosed. The testing device includes a test pattern unit, a light source, a lens and a drive unit. The light source provides light which penetrates the test pattern unit. The test pattern unit is positioned on the same axis as the lens and is located between the light source and the lens. The drive unit drives the test pattern unit to displace along the axis so as to adjust the distance between the test pattern unit and the lens.

Description

Detection component

The present invention relates to a detection component, in particular to a detection component with adjustable object distance, which is suitable for optical detection of optical devices with different object distances.

The evolution of technology has made optical devices, such as lenses or camera modules, change in size, specifications, and use methods. Because optical devices undergo optical tests before they leave the factory to ensure their quality, the items that need to be tested also follow increase. Optical detection was the earliest device that focused at infinity. It uses parallel light to generate imaging, which can be front projection detection or back projection detection. Later macro technology requires optical devices to focus detection through a limited distance. Therefore, many optical devices today need to go through both infinity and limited distance focus detection.

FIG. 1A is a schematic diagram of a conventional detection device for detecting an optical device. The detection device 101 includes a light source 130, a test pattern 132, a collimator 140, an image sensor 110, and a computing device 160. The light source 130 emits light and penetrates the test pattern 132 to form a patterned light pattern. After the patterned light pattern passes through the device under test 120, it is simulated by the collimator 140 to form an image with infinite distance on the image sensor 110. The computing device 160 then captures the image data of the image sensor 110 for analysis.

FIG. 1B shows a schematic diagram of another conventional detection device for detecting an optical device. The detection device 102 is similar to the detection device 101 in FIG. 1B. The difference is that the optical path between the device under test 120 and the collimator 140 in the detection device 102 generates a virtual image. And the test pattern 132 can be moved to the position of the test pattern 133 to perform different limited distance focusing tests on the device to be tested 120.

In other words, in the conventional technology, after the infinity focus test of the device under test is completed, the collimator needs to be removed first, and then the test pattern is moved to an appropriate position to perform a limited distance focus test, and each time When testing a new device under test, the steps of moving the collimator and testing the pattern described above need to be repeated. This is not only time-consuming but also inconvenient.

Therefore, in order to overcome the shortcomings of the conventional technology, the detection component described in the embodiment of the present invention uses a driving unit to adjust the distance between the test pattern unit and the lens, so that the lens can project an infinite distance according to the distance of the test pattern Imaging or limited-distance imaging, so that the optical device to be tested can be used for both infinity and limited-distance focus detection with the same detection component.

The purpose of the present invention is to provide a detection component suitable for detecting an optical device, including a test pattern unit, a light source, and a driving unit. The test pattern unit has a test pattern, and the light source has light for penetrating the test pattern. The driving unit is connected to the test pattern unit, and is used for driving the test pattern unit to move along the axis through which the light penetrates the test pattern.

Another object of the present invention is to provide a detection component suitable for detecting an optical device, including a test pattern unit, a light source, a driving unit, and a lens. The test pattern unit and the lens are located on the same axis, and the test pattern unit is located between the light source and the lens. The driving unit is connected to the test pattern unit and drives the test pattern unit to move along the axis to adjust the distance between the test pattern unit and the lens.

Optionally, the light source is disposed between the driving unit and the test pattern unit.

Optionally, the light source is connected to the test pattern unit, and when the test pattern unit is displaced, the light source is displaced in linkage.

Optionally, the detection component further includes a track, wherein the test pattern unit is disposed thereon and is displaced along the track.

Optionally, the detection component further includes a lens holder for mounting a lens on the axis, wherein the test pattern unit is located between the light source and the lens. In addition, the driving unit drives the test pattern unit to be displaced along the axis to adjust a distance between the test pattern unit and the lens.

Optionally, the driving unit is a motor.

Optionally, the lens is a fixed focus lens.

In a word, the new type changes the imaging position of the test pattern unit through the driving unit. The distance between the imaging position of the test pattern unit and the optical device to be measured is the object distance of the optical device to be measured. By changing the imaging position of the test pattern unit, imaging tests with different object distances can be performed on the optical device to be tested. Therefore, compared with the prior art, the present invention provides a more convenient and better detection component.

In order to make the above and other objects, features, and advantages of the present model more comprehensible, the accompanying drawings are described in detail below.

In order to fully understand the purpose, characteristics and effects of the present invention, the following specific embodiments and the accompanying drawings are used to make a detailed description of the present invention, which will be described later.

The embodiment of the present invention provides a detection component for detecting an optical device, so as to solve the conventional need to use different or multiple detection equipment units to achieve two types of focus detection of the optical device at infinite distance and limited distance. Further, the embodiment of the present invention uses the driving unit to move the test pattern unit to adjust the distance between the test pattern unit and the lens. When detecting an optical device, the lens of the detection component can project an infinite distance or a limited distance to the optical device and the image sensor according to the distance. The computer device connected to the image sensor can analyze the optical device at infinity and limited. Distance optical characteristics.

First, please refer to FIG. 2, which is a schematic diagram of a detection component according to an embodiment of the present invention. As shown in FIG. 2, the detection assembly 200 includes a light source 210, a test pattern unit 220, a driving unit 230, and a lens 240. The light source 210 can provide light to illuminate the test pattern unit 220. The test pattern unit 220 is located between the light source 210 and the lens 240 and has a light-transmissive test pattern. For example, the test pattern unit 220 may be a hood, and the test pattern is a pattern engraved on the hood, such as ten Glyph, but the shape of the test pattern need not limit the new model. The driving unit 230 is connected to the test pattern unit 220 so as to drive the test pattern unit 220 to be displaced, thereby adjusting the distance d between the test pattern unit 220 and the lens 240.

The light source 210, the test pattern unit 220, the driving unit 230, and the lens 240 of the detection component 200 can be integrated into a single piece by being disposed on the base 250. The base 250 can further include a track 260, wherein the test pattern unit 240 is disposed on the track 260 and is displaced along the track 260.

In this embodiment, the light source 210 is connected to the test pattern unit 220. Therefore, when the test pattern unit 220 is displaced, the light source 210 is displaced in conjunction. The light source 210 and the test pattern unit 220 may be two connected components as shown in FIG. 2 or integrated single components as shown by the long dotted line in FIG. 2. The light source 210 may be an LED lighting system or any device that provides a light penetration test pattern. In addition, the light source 210 may be a visible light, an invisible light, a broadband or a narrow-band light source according to the application of the optical device 400 to be detected.

When the test pattern unit 220 is driven and displaced by the driving unit 230, it is displaced horizontally toward the lens 240. In other words, the change in the distance d between the test pattern unit 220 and the lens 240 is only an increase or decrease in the distance line length, and the distance line axial direction is constant.

Next, please refer to FIG. 3, which shows the structure of the detection assembly 200 according to the embodiment of the present invention. The base 250 of the detection assembly 200 is provided with a light source 210, a test pattern unit 220, a driving device 230, and a lens 240. The light source 210 and the test pattern unit 220 are connected via a connecting member 215 and are mounted on the rail 260 through the supporting frame 280. The lens 240 is mounted on the base 250 through the lens holder 270, and the lens 240 and the test pattern unit 220 are located on the same axis A. When the driving unit 230 drives the test pattern unit 220 to operate, the test pattern unit 220 is displaced along the track 260 and the axis A, and advances or retreats relative to and toward the lens 240.

The driving unit 230 may be a motor, such as a linear motor, a servo motor, a stepping motor, a rotary motor, or any other device that can cause the test pattern unit 210 to move, which is not limited in the present invention.

The distance d between the lens 240 and the test pattern unit 220, or more specifically, the distance between the lens 240 and the patterned light pattern, may determine whether the imaging projected by the lens 240 is located at an infinite distance or a limited distance, and is different Imaging can be used to detect different optical characteristics. Thanks to the formula { } Calculating the focal length f, image distance q, and object distance p (that is, the distance d of the new model) of the lens 240 is a conventional technique, and is not repeated here. The lens 240 may be a fixed focus lens, or any lens capable of projecting imaging at infinity and a limited distance, which is not limited in the present invention. In this embodiment, the lens 240 is already installed in the detection component 200, but in other embodiments, the detection component may be provided with only a lens holder, and the lens is mounted on the lens holder during optical detection.

FIG. 4 is a schematic diagram of a state in which the detection assembly 200 of the embodiment of the present invention is used in a detection optical device. In an optical detection environment, the detection component 200 and the image sensor 500 are respectively disposed at the front and rear ends of the optical device 400 to be measured. When detecting the optical characteristics of the optical device 400 at infinity, the driving unit 230 of the detection module 200 receives a control instruction issued by a control machine (not shown) and drives the test pattern unit 220 to move the lens according to the control instruction. 240 projects the position of infinity imaging. During the detection, the light from the light source 210 penetrates the test pattern of the test pattern unit 220 to form an unimaged patterned light pattern, projects an infinite patterned light pattern through the lens 240, and then passes through the optical device 400 to be measured and is imaged on Image sensor 500. The image sensor 500 then transmits the image data to a computer device (not shown) for analysis of infinite optical characteristics.

Next, when the optical characteristics of the same optical device 400 are measured at a limited distance, the driving unit 230 of the detection module 200 receives another control instruction issued by the control machine (not shown) and drives the test pattern unit 220 according to the control instruction. Move to a position where the lens 240 can project a limited distance image. During the detection, the light from the light source 210 penetrates the test pattern of the test pattern unit 220 to form an unimaged patterned light pattern. A limited distance patterned light pattern is projected through the lens 240, and then passes through the optical device 400 and is imaged on the image sensor.器 500。 500. The image sensor 500 then transmits the image data to a computer device (not shown) for analysis of the optical characteristics at a limited distance.

In this way, the two optical characteristics of the optical device 400: infinite distance and limited distance, can be detected by the detection component 200. That is, the same detection device can be used for infinity focus detection and limited distance focus detection, without the need to add or remove the detection device, thereby increasing the convenience of optical detection.

5A and 5B are a schematic top view and a side view of a detection component 300 according to another embodiment of the present invention. The detection component 300 includes a light source 310, a test pattern unit 320, a driving unit 330, and a lens frame 370. The lens 340 can be mounted adjacent to the test pattern unit 320 through the lens frame 370 and assembled to the base 350. The test pattern unit 320 is connected to the driving unit 330 through the moving member 365, and the driving unit 330 uses the moving member 365 to drive the test pattern unit 320 to be displaced. In this embodiment, although the light source 310 is structurally separated from the test pattern unit 320, its light can still reach the lens 340 after passing through the test pattern of the test pattern unit 320. Therefore, when the test pattern unit 320 is along the light When the axis penetrating the test pattern is displaced, the light source 310 does not move in tandem.

The embodiment of the present invention discloses that the driving unit drives the displacement of the test pattern unit in the manner of a track and a moving member, but it is only an example in the embodiment, and does not limit the connection relationship and the driving implementation manner of the new driving unit and the test pattern unit.

To sum up, the detection component provided by the new embodiment uses a driving unit to drive the displacement of the test pattern unit to adjust the distance between the test pattern unit and the lens, so that the lens can project imaging at infinite or limited distance according to the object distance. , And the projected image can be used to detect the optical characteristics of the optical device. In this way, a user, such as a manufacturer, can place an infinity focus detection and a limited distance focus detection separately after placing the optical device to be tested in the detection environment provided with the new type of detection component and image sensor, and then capture After taking image information and analyzing it, the optical characteristics of the optical device at infinity and at a limited distance are obtained. The detection component provided by the new embodiment can automatically switch between two types of focus detection during optical detection, without adding or removing detection equipment, so it can reduce the cost of optical detection and increase detection efficiency.

The present invention has been disclosed in the foregoing with a preferred embodiment. However, those skilled in the art should understand that the above embodiments are only used to describe the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the foregoing embodiments should be included in the scope of the present invention. Therefore, the protection scope of this new model shall be the one defined by the scope of patent application.

101‧‧‧detection device
102‧‧‧Detection device
110‧‧‧Image Sensor
120‧‧‧device under test
130‧‧‧light source
132‧‧‧test pattern
133‧‧‧Test pattern
140‧‧‧collimator
160‧‧‧ Computing Device
200‧‧‧Detection components
210‧‧‧ light source
215‧‧‧link
220‧‧‧Test pattern unit
230‧‧‧Drive unit
240‧‧‧ lens
250‧‧‧ base
260‧‧‧ track
270‧‧‧ lens holder
280‧‧‧bearing rack
300‧‧‧Detection components
310‧‧‧light source
320‧‧‧test pattern unit
330‧‧‧Drive unit
340‧‧‧ lens
350‧‧‧ moving parts
365‧‧‧base
370‧‧‧ lens holder
400‧‧‧ Optical device
500‧‧‧Image Sensor

FIG. 1A shows a conventional optical test device.

FIG. 1B shows another conventional optical test device.

FIG. 2 is a schematic top view of a detection component according to the embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a detection component according to the embodiment of the present invention.

FIG. 4 is a schematic diagram of a state of the detection assembly according to the embodiment of the present invention when it is used in a detection optical device.

5A and 5B are a schematic plan view and a side view of a detection component according to another embodiment of the present invention.

Claims (13)

A detection component is suitable for detecting an optical device. The detection component includes:
A test pattern unit having a test pattern;
A light source for providing light to penetrate the test pattern; and a driving unit connected to the test pattern unit;
The driving unit drives the test pattern unit to be displaced along an axis through which the light penetrates the test pattern. The detection component described in item 1 of the request item further includes:
A base, wherein the test pattern unit, the light source and the driving unit are disposed on the base. The detection component according to claim 1, wherein the light source is disposed between the driving unit and the test pattern unit. The detection component according to claim 1, wherein the light source is connected to the test pattern unit, and when the test pattern unit is displaced, the light source is displaced in linkage. The detection component described in item 1 of the request item further includes:
A track in which the test pattern unit is disposed thereon, and the test pattern unit is displaced along the track. The detection component described in item 1 of the request item further includes:
A lens holder is used to mount a lens on the axis, wherein the test pattern unit is located between the light source and the lens. The detection component according to claim 6, wherein the driving unit drives the test pattern unit to move along the axis to adjust a distance between the test pattern unit and the lens. A detection component is suitable for detecting an optical device. The detection component includes:
A light source
A shot
A test pattern unit disposed between the light source and the lens; and a driving unit connected to the test pattern unit;
The test pattern unit and the lens are located on the same axis, and the driving unit drives the test pattern unit to move along the axis to adjust the distance between the lens and the test pattern unit. The detection component described in item 8 of the request item further includes:
A base, wherein the light source, the lens, the test pattern unit and the driving unit are disposed on the base. The detection component according to item 8 of the claim, wherein the light source is disposed between the driving unit and the test pattern unit. The detection component according to claim 8, wherein the light source is connected to the test pattern unit, and when the test pattern unit is displaced, the light source is displaced in linkage. The detection component described in item 8 of the request item further includes:
A track in which the test pattern unit is disposed thereon, and the test pattern unit is displaced along the track. A detection component as described in item 8 is requested, wherein the lens is a fixed focus lens.