CN215573693U

CN215573693U - Special testing arrangement of endoscope camera system

Info

Publication number: CN215573693U
Application number: CN202121775243.4U
Authority: CN
Inventors: 于立民
Original assignee: Shanghai Beilan Optoelectronics Technology Co ltd
Current assignee: Shanghai Beilan Optoelectronics Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-01-18
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses a special testing device for an endoscope camera system, which comprises a background integrating sphere, a target integrating sphere, a first light source, a first monitoring detector, an image target, a second light source, a third light source and a second monitoring detector, wherein the background integrating sphere is internally provided with the target integrating sphere, the target integrating sphere is provided with the first light source and is connected with the first monitoring detector, the image target is arranged in front of the target integrating sphere, the background integrating sphere is provided with the second light source and the third light source, and the background integrating sphere is connected with the second monitoring detector. By adopting the technical scheme, the convenient and practical special testing device for the endoscope camera system is manufactured. The nested structure that adopts single integrating sphere and hemisphere to combine together both to realize having guaranteed the degree of consistency to the grey scale target, guarantee the degree of consistency of background again, can satisfy the parameter detection to different angles of different endoscopes simultaneously, make the degree of accuracy of test improve greatly, greatly reduce the error, the light source is changed simple and conveniently.

Description

Special testing arrangement of endoscope camera system

Technical Field

The utility model relates to an endoscope testing device, in particular to a special testing device for an endoscope camera system.

Background

With the development of optical technology and the advancement of medical technology, endoscopes become irreplaceable devices in modern medical diagnosis and treatment, the variety of endoscopes is increasing, and the technical requirements are diversified. With the technological advancement of electronics, electronic endoscopes and imaging systems are becoming new trends. In addition, the capsule endoscope is gradually popularized, the performance monitoring is also very important while the technology is popularized, new standards continuously appear, and new technical challenges are provided for manufacturers and detection mechanisms.

The standard YY/T1603-2018 of the medical endoscope camera system is just issued, and higher requirements are put forward on the optical performance of the endoscope camera system, wherein the brightness response characteristic of the camera system, the signal-to-noise ratio of the camera system, the spatial frequency response of the camera system and the still image tolerance of the camera system are mainly required to be measured. In order to meet the test of the medical endoscope camera system, a convenient and practical special test device for the endoscope camera system is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a convenient and practical special test device for an endoscope camera system.

The special testing device for the endoscope camera system comprises a background integrating sphere, a target integrating sphere, a first light source, a first monitoring detector, an image target, a second light source, a third light source and a second monitoring detector, wherein the target integrating sphere is arranged in the background integrating sphere, the first light source is arranged on the target integrating sphere, the target integrating sphere is connected with the first monitoring detector, the image target is arranged in front of the target integrating sphere, the second light source and the third light source are arranged on the background integrating sphere, and the background integrating sphere is connected with the second monitoring detector.

In the above scheme, the target integrating sphere is nested in the background integrating sphere, and the target integrating sphere is a semi-integrating sphere which can rotate by a certain angle.

In the scheme, a standard support is arranged on the plane side of the target integrating sphere, a standard test board is arranged on the standard support, and an image target is arranged on the standard test board.

In the above scheme, a first variable diaphragm is arranged between the target integrating sphere and the first light source, a second variable diaphragm is arranged between the background integrating sphere and the second light source, and a third variable diaphragm is arranged between the background integrating sphere and the third light source.

In the above scheme, the background integrating sphere is provided with an opening, and the opening is provided with a camera system.

In the above scheme, the system further comprises an image collector, and the image collector is connected with the second monitoring detector.

The utility model has the advantages and beneficial effects that: the utility model provides a convenient and practical special test device for an endoscope camera system. The nested structure that adopts single integrating sphere and hemisphere to combine together both to realize having guaranteed the degree of consistency to the grey scale target, guarantee the degree of consistency of background again, can satisfy the parameter detection to different angles of different endoscopes simultaneously, make the degree of accuracy of test improve greatly, greatly reduce the error, the light source is changed simple and conveniently. The utility model can test beyond the standard requirement and realize more accurate test.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: A. background integrating sphere B, target integrating sphere 1, first monitoring detector 2, second light source 3, first light source 4, third light source 5, second monitoring detector 6, image target 7, image collector

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, the utility model is a special testing device for an endoscope camera system, which comprises a background integrating sphere a, an object integrating sphere B, a first light source 3, a first monitoring detector 1, an image target 6, a second light source 2, a third light source 4 and a second monitoring detector 5, wherein the background integrating sphere a is internally provided with the object integrating sphere B, the object integrating sphere B is provided with the first light source, the object integrating sphere B is connected with the first monitoring detector 1, the image target 6 is arranged in front of the object integrating sphere B, the background integrating sphere a is provided with the second light source 2 and the third light source 4, and the background integrating sphere a is connected with the second monitoring detector 5.

The target integrating sphere B is nested in the background integrating sphere A, and the target integrating sphere B is a half integrating sphere capable of rotating for a certain angle.

And a standard support is arranged on the plane side of the target integrating sphere B, a standard test board is arranged on the standard support, and an image target 6 is arranged on the standard test board.

A first variable diaphragm is arranged between the target integrating sphere B and the first light source 3, a second variable diaphragm is arranged between the background integrating sphere A and the second light source 2, and a third variable diaphragm is arranged between the background integrating sphere A and the third light source 4.

An opening is arranged on the background integrating sphere A, and a camera system is arranged at the opening.

The device also comprises an image collector 7, and the image collector 7 is connected with the second monitoring detector 5.

The system is required to realize uniform large-area background and small-area gray scale according to the requirements of new national standards, the uniformity of large-area and small-area areas is required to be as high as possible, the brightness values of the large-area and small-area areas are required to be independently controlled, the standard requires that small-area gray scale blocks are illuminated from the rear part, the large-area background is illuminated from the front part, the large-area background and the small-area gray scale blocks are independently controlled, and the uniformity is as uniform as possible. For small gray scale blocks, the requirement on the uniformity of a backlight source by adopting backlight is very high, and if the Lambert characteristic of the gray scale blocks is not good, an obvious facula effect appears in the light emitting direction. The above conditions put requirements on the design of the system.

The small-area gray scale part adopts an integrating sphere structure for illumination, the integrating sphere structure can enable the uniformity of illumination to reach about 98% through optimized design, the standard is far higher than the standard which is required by the standard and is more than 90%, the background uniformity of a small-area target is guaranteed, and for a test camera system, when an image signal of one area is collected, compared with a common system, the uniformity can greatly improve the test accuracy and greatly reduce errors. The gray value or the brightness value of the small gray scale block can be directly monitored by using an internal detector, the gray scale can be automatically adjusted by software, an independent brightness meter is not required to be used for testing externally, and the operation process is simple. The light source of the integrating sphere can adopt a light source with high color rendering, such as a full-spectrum light source with color temperature of 6000K or 5000K, and the light source with high color rendering has very favorable conditions for calibrating indexes such as chromaticity. The light source is simple and convenient to replace.

The light source is driven in a customized brightness adjustable mode, the dynamic range is large, the required brightness level can be realized at will, the adjustable level is more than 10000, and the gray level of 8 levels required by the standard can be completely covered. The test can be carried out beyond the standard requirement, and more accurate test is realized. The light source can simulate the spectral distribution curves of D65 and A32 standard illuminants and can be used as a standard light source.

The rotatable target integrating sphere B is nested in the background integrating sphere A, the image target installation mechanism is arranged on the plane side of the target integrating sphere, and the image target installation mechanism can be simply and manually replaced and also can be removed, so that the back of the opening of the integrating sphere can also be used as a gray target and also can be used as a backlight source of the target, and the image target installation mechanism can be switched freely according to requirements.

Various target cards can be placed on the plane side of the target integrating sphere, tests can be conducted according to different test parameters, and the target integrating sphere directly works as a backlight source. The integrating sphere light source can also be used as a flat field calibration tool to correct flat field signal response and improve picture quality. A plurality of targets are customized according to standard requirements, the size of the target is smaller than 50mm, the endoscope product is convenient to test and use, the targets comprise a color card, a resolution card, a gray scale card, a harmonic Siemens star card, a distortion card and the like, and the targets required by all test parameters of the standard requirements are covered. A first monitoring detector is arranged on a sphere of the target integrating sphere, and after calibration, the brightness value of the target gray scale can be directly read by reading the reading of the first monitoring detector without independently using the brightness and carrying out testing.

The system can realize the imaging flat field correction of the endoscope camera system. Flat field correction is the most basic correction requirement of all imaging technologies, can ensure that the image surface uniformity (gray scale) of an image is consistent, and avoids the occurrence of vignetting, flaw points and noise points, so that the original image condition of an object can be truly reduced, and the image uniformity is more important in medical diagnosis in particular.

When the device is used, different brightness outputs are realized by adjusting the sizes of the openings of the first iris diaphragm, the second iris diaphragm and the third iris diaphragm, and uniform light is carried out in the background integrating sphere and the target integrating sphere to achieve uniform light source output.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The special testing device for the endoscope camera system is characterized by comprising a background integrating sphere, a target integrating sphere, a first light source, a first monitoring detector, an image target, a second light source, a third light source and a second monitoring detector, wherein the target integrating sphere is arranged in the background integrating sphere, the first light source is arranged on the target integrating sphere, the target integrating sphere is connected with the first monitoring detector, the image target is arranged in front of the target integrating sphere, the second light source and the third light source are arranged on the background integrating sphere, and the background integrating sphere is connected with the second monitoring detector.

2. The special testing device for the endoscope camera system according to claim 1, wherein the target integrating sphere is nested in the background integrating sphere, and the target integrating sphere is a semi-integrating sphere which can rotate a certain angle.

3. The special testing device for the endoscope camera system according to claim 1, wherein a standard support is provided on a planar side of the objective integrating sphere, a standard testing board is provided on the standard support, and an image target is provided on the standard testing board.

4. The special test device for the endoscope imaging system according to claim 1, wherein a first variable diaphragm is provided between the objective integrating sphere and the first light source, a second variable diaphragm is provided between the background integrating sphere and the second light source, and a third variable diaphragm is provided between the background integrating sphere and the third light source.

5. The special testing device for the endoscope camera system according to claim 1, wherein an opening is provided on the background integrating sphere, and the camera system is provided at the opening.

6. The special test device for the endoscope camera system according to claim 1, further comprising an image collector, wherein the image collector is connected with the second monitoring detector.