CN220153848U

CN220153848U - Electronic endoscope and test equipment for endoscope camera system

Info

Publication number: CN220153848U
Application number: CN202321374280.3U
Authority: CN
Inventors: 钱学波; 陈成; 王颖; 李健; 代旭宸; 王斌; 杨建刚
Original assignee: TIANJIN MEDICAL DEVICES QUALITY SUPERVISION AND TESTING CENTER
Current assignee: TIANJIN MEDICAL DEVICES QUALITY SUPERVISION AND TESTING CENTER
Priority date: 2023-06-01
Filing date: 2023-06-01
Publication date: 2023-12-08
Anticipated expiration: 2033-06-01

Abstract

The utility model provides a test device for an electronic endoscope and an endoscope camera system, which comprises a gray-scale light source, a test target plate, a background light source, a lens clamp and an image collector, wherein the gray-scale light source and the background light source are arranged on two sides of the test target plate, and the test device is characterized in that: a diaphragm is arranged between the gray-scale light source and the test standard plate, and comprises a diaphragm hole and a diaphragm plate; the background light sources are at least two and are used for emitting background light; the background light is incident on the test target at an incidence angle, the space uniformity of illumination of the test target is less than or equal to 20 percent, and the incidence angle is greater than 0 degrees; the background light passing through the test target is incident on the diaphragm plate; the gray scale light source is used for emitting gray scale light, and the gray scale light can pass through the diaphragm hole to irradiate the test target. The utility model can avoid the influence of the background light on the minimum brightness of the gray-scale light, increase the adjustment range of the background brightness and enhance the accuracy of the test result.

Description

Electronic endoscope and test equipment for endoscope camera system

Technical Field

The utility model relates to the technical field of endoscope testing equipment, in particular to electronic endoscope and testing equipment for an endoscope imaging 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 types of endoscopes are more and more, and the technical requirements are more and more diversified. With the technical progress of electronics, electronic endoscopes and endoscopic imaging systems have become a new trend. The monitoring of performance is also very important while the technology is popular, new standards are continuously presented, and new technical challenges are presented to manufacturers and detection institutions.

According to medical industry standards YY/T1587-2018 medical endoscope electronic endoscope and YY/T1603-2018 medical endoscope function supply device image pickup system, manufacturers conduct factory testing on imaging performance of the electronic endoscope or the endoscope image pickup system, and the items of imaging performance testing mainly comprise brightness response characteristics, signal-to-noise ratio, spatial frequency response, static image latitude and the like. The test method provided by the industry standard is as follows: when the brightness response characteristic, the signal-to-noise ratio and the latitude of the static image are tested, a test window is arranged on a test target (a spectral neutral gray scale plate is selected), large-area background illumination is provided on one surface of the test target, which is close to an electronic endoscope or an endoscope camera system, and small-area gray scale illumination is provided on the other surface of the test target; when the test space frequency responds, an illumination light source is provided on one surface of a test target (a sine wave star-shaped test target is selected to be used) close to an electronic endoscope or an endoscope shooting system; and shooting the test target by using an electronic endoscope or an endoscope shooting system, acquiring and storing images by using an image acquisition device, and finally carrying out result processing.

At present, when background illumination and gray-scale illumination are carried out on test equipment commonly used in the industry, an integrating sphere is adopted to carry out light homogenization on light, and the test equipment has the following defects:

(1) The standard test method requires: the minimum brightness of the gray-scale illumination should be far lower than the dark-area cut-off critical brightness value of the tested electronic endoscope or the endoscope camera system. After the light emitted by the background light source is diffusely reflected by the background light integrating sphere, the light is transmitted along a plurality of directions, and the light sequentially passes through the test window and the opening on the gray-scale light integrating sphere and enters the gray-scale light integrating sphere, so that the brightness value of the light in the gray-scale light integrating sphere is increased, the minimum brightness of the light output by the gray-scale light integrating sphere is always maintained at a higher level, and the requirement of standard test cannot be met.

(2) The specification test method also requires: in the whole brightness adjustment process of the gray-scale illumination, the brightness of the background illumination can keep the whole gain of the tested electronic endoscope or the endoscope image pickup system unchanged, and the whole gains of the electronic endoscope or the endoscope image pickup system produced by different manufacturers are different. Due to diffuse reflection, after the light is homogenized by the integrating sphere, the brightness of the light is greatly attenuated, and the brightness of the light irradiated to the test target plate is inversely proportional to the inner diameter surface area of the integrating sphere, so that the light can be used as the background illumination, the adjustable range of the brightness value of the light is smaller, and the range of an applicable electronic endoscope or an endoscope camera system is smaller.

Disclosure of Invention

The present utility model is directed to an electronic endoscope and a test apparatus for an endoscope imaging system, which solve the above-described problems in the background.

The technical scheme adopted by the utility model is as follows: the utility model provides a test equipment that electron endoscope and endoscope camera system used, includes gray level light source, test target, background light source, mirror body anchor clamps and image acquisition ware, the gray level light source with the background light source is located the both sides of test target, mirror body anchor clamps with the background light source is located the homonymy of test target, mirror body anchor clamps are used for centre gripping electron endoscope or endoscope camera system, wherein:

a diaphragm is arranged between the gray-scale light source and the test standard plate, and comprises a diaphragm hole and a diaphragm plate;

the background light sources are at least two and are used for emitting background light; the background light is incident on the test target at an incidence angle, the space uniformity of illumination of the test target is less than or equal to 20 percent, and the incidence angle is greater than 0 degrees; the background light passing through the test target is incident on the diaphragm plate;

the gray scale light source is used for emitting gray scale light, and the gray scale light can pass through the diaphragm hole to irradiate the test target.

Further, the test equipment for the electronic endoscope and the endoscope camera system further comprises an installation box body, a target clamping groove is formed in the installation box body, the test target is detachably arranged in the target clamping groove, the gray-scale light source is arranged in the installation box body, and the gray-scale light passes through the installation box body and irradiates on the test target.

Further, a positioning plate is arranged on the mounting box body, a first guide rail and a second guide rail are connected to the positioning plate, the first guide rail is rotationally connected with the positioning plate, the background light source is arranged on the first guide rail in a sliding mode, and a scale mark for indicating the position of the background light source is arranged on the first guide rail; the second guide rail is fixedly connected with the positioning plate, the mirror body clamp is arranged on the second guide rail in a sliding mode, and scale marks used for indicating the position of the mirror body clamp are arranged on the second guide rail.

Further, the backlight comprises a lens, a backlight body and a light guide beam, wherein an inlet end and an outlet end of the light guide beam are respectively connected with the backlight body and the lens, a lens support is slidably arranged on the first guide rail, and the lens is detachably arranged on the lens support.

Further, a sliding table capable of sliding is arranged on the second guide rail, a scissor type lifting table is arranged at the top of the sliding table, and the mirror clamp is arranged at the top of the scissor type lifting table.

Further, the top surface of slip table is equipped with the spout, the bottom of cutting formula elevating platform is equipped with the slider, rotate in the spout and be provided with the lead screw, the lead screw with the slider silk connects, so as to drive the slider is in the spout is followed perpendicularly to the direction of second guide rail removes.

Further, the testing equipment for the electronic endoscope and the endoscope camera system also comprises an angle adjusting plate arranged between the scissor type lifting table and the endoscope clamp, which comprises a top plate, a middle plate and a bottom plate which are connected in sequence,

the top plate is connected with one end of the middle plate through a horizontal rotating shaft, a vertical bolt is screwed at the end part of the middle plate far away from the horizontal rotating shaft, and the top of the vertical bolt is abutted against the bottom surface of the top plate;

the middle plate is connected with the bottom plate through a vertical rotating shaft, a horizontal bolt is connected to the bottom plate through a wire, and the end of the horizontal bolt is abutted to the side face of the middle plate.

Further, a vertical reset spring is arranged between the top plate and the middle plate, and a horizontal reset spring is arranged between the side surface of the middle plate and the bottom plate.

Further, the locating part is movably connected to the target clamping groove, the locating part is abutted to the edge of the target clamping groove, and the end part of the locating part abutted to the target clamping groove can be close to or far away from the edge of the target clamping groove.

Further, the second guide rail is perpendicular to the test target, two first guide rails are arranged, and the two first guide rails are arranged on two sides of the second guide rail and form the same included angle with the plane where the test target is located.

The utility model has the beneficial effects that:

(1) Through the cooperation of the diaphragm and the background light source, the requirement of a standard test method on the space uniformity of the test target illumination can be met, and the problem that the minimum brightness of gray-scale light cannot be adjusted to a preset minimum value according to the requirement due to the fact that the background light enters the gray-scale light source through the light outlet of the gray-scale light source can be avoided; the first guide rail and the scale marks on the first guide rail reduce the debugging difficulty of the background light incident angle and the distance between the background light source and the test target; in the test equipment, the background light emitted by the plurality of background light sources is directly incident on the test target, the space uniformity of illumination of the test target is regulated by utilizing the principle of vector superposition, compared with the method of utilizing the integrating sphere to homogenize light in the prior art, the brightness loss of the background light in the test equipment is lower, and the total brightness after superposition is higher than the brightness of light emitted by the single background light source, so that the adjustable range of the brightness value of the background illumination light of the test equipment is greatly improved, the test equipment can be suitable for testing of electronic endoscopes or endoscope camera systems with various different overall gains, and the applicability is improved.

(2) The test target is detachably connected with the mounting box body, is suitable for various test projects, for example, when testing space response frequency, the test target can be selected from sine wave star-shaped test targets, and when testing brightness response characteristics, signal to noise ratio and static image latitude, the test target can be selected from spectrum neutral gray scale plates, and the difference is that the gray scale light source does not need to be started in the testing process of the former. The locating part on the target draw-in groove and cut formula elevating platform, angle adjusting plate isotructure set up, have realized the test target with the accurate regulation of position or angle of mirror body anchor clamps has improved the accuracy of test result and this test equipment's suitability.

Drawings

FIG. 1 is an overall block diagram of an embodiment of the present utility model;

FIG. 2 is a block diagram of a gray scale light source in an embodiment of the utility model;

FIG. 3 is an enlarged view of the structure A of FIG. 1 in accordance with an embodiment of the present utility model;

FIG. 4 is a diagram of the connection of a backplane and midplane in an embodiment of the utility model;

FIG. 5 is a connection structure diagram of a slide table and a slider in an embodiment of the present utility model;

FIG. 6 is a block diagram of a test target in an embodiment of the utility model;

fig. 7 is a structural diagram of a diaphragm in an embodiment of the utility model.

In the figure:

1. a gray scale light source; 1a, an integrating sphere; 1b, gray scale light source body; 1c, an electric light attenuator; 1d, a brightness meter; 2. testing a target; 2a, a test window; 3. a background light source; 3a, a lens; 3b, a background light source body; 3c, guiding the light beam; 4. a mirror body clamp; 5. an image collector; 6. a diaphragm; 6a, diaphragm holes; 6b, diaphragm plates; 7. installing a box body; 7a, positioning plates; 8. a first guide rail; 9. a lens holder; 10. a second guide rail; 11. a sliding table; 11a, a chute; 12. a scissor lift; 13. a slide block; 14. a screw rod; 15. a top plate; 16. a middle plate; 17. a bottom plate; 17a, mounting plates; 18. a horizontal rotating shaft; 19. a vertical bolt; 20. a vertical return spring; 21. a vertical rotating shaft; 22. a horizontal bolt; 23. a horizontal return spring; 24. a target card slot; 25. and a limiting piece.

Detailed Description

The following describes the technical scheme of the embodiment of the present utility model in detail through the attached drawings.

In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

Referring to fig. 1, 2, 6 and 7, a test device for an electronic endoscope and an endoscope camera system comprises a gray-scale light source 1, a test target plate 2, a background light source 3, a lens clamp 4, an image collector 5 and a diaphragm 6, wherein the gray-scale light source 1 and the background light source 3 are arranged on two sides of the test target plate 2, the lens clamp 4 and the background light source 3 are arranged on the same side of the test target plate 2, and the lens clamp 4 is used for clamping an electronic endoscope or an endoscope test system to be tested; the signal input end of the image collector 5 is connected with the signal output end of the electronic endoscope or the endoscope testing system to be tested and is used for collecting pictures shot by the electronic endoscope or the endoscope testing system; the diaphragm 6 is arranged between the gray-scale light source 1 and the test standard plate 2, and the diaphragm 6 comprises a diaphragm hole 6a and a diaphragm plate 6b; the background light sources 3 are at least two and are used for emitting background light, the background light is incident on the test target 2 at an incident angle which is larger than 0 degrees, and the incident angles of the background light can be the same or different, but when the test equipment is used, accurate calculation, debugging and detection are required to be carried out so as to ensure that after the background light is overlapped on the surface of the test target 2, the space uniformity of illumination of the test target 2 is smaller than or equal to 20 percent, so as to meet the test requirements set by the pharmaceutical industry standard in the background technology of the utility model, and the background light passing through the test window 2a on the test target 2 is also required to be incident on the diaphragm plate 6b when the test target 2 is a spectral neutral gray scale plate; the gray-scale light source 1 is used for emitting gray-scale light, the gray-scale light can pass through the diaphragm hole 6a to irradiate the test target 2, when the test target 2 selects a spectrum neutral gray-scale plate, the gray-scale light can pass through the test window 2a on the test target 2, and when the test target 2 selects a sine wave star-shaped test target, the gray-scale light source 1 does not need to be started.

The working principle of the utility model is as follows: by adjusting the incidence angle of each background light, all the background light passing through the test window 2a is incident on the diaphragm plate 6b, but not sequentially passes through the test window 2a and the diaphragm hole 6a to enter the gray scale light source 1, so that the gray scale light emitted by the gray scale light source 1 can be gradually attenuated to the preset minimum brightness according to the requirement of a standard test method; meanwhile, through accurate calculation and adjustment of brightness and incidence angles of all background lights, after all the background lights are overlapped on the surface of the test target 2, the space uniformity of illumination of the test target 2 meets the requirements of a standard test method, and as all the background lights are not uniformly illuminated by an integrating sphere and are directly irradiated and overlapped, the brightness loss is smaller, and the total brightness after the overlapping is higher than the brightness of light rays emitted by a single background light source 3, so that the adjustable range of the brightness value of the background illumination light rays of the test equipment is greatly improved, and the test device is suitable for testing electronic endoscopes or endoscope imaging systems with various different overall gains and improves the applicability.

The gray scale light source 1 adopts a traditional integrating sphere light homogenizing method, namely the gray scale light source 1 comprises an integrating sphere 1a and a gray scale light source body 1b. In addition, in this embodiment, a luminance detector and a luminance adjuster are further configured in the gray scale light source 1, and the luminance detector and the luminance adjuster are connected with a computer or other devices through signals, and the luminance adjuster is controlled to gradually attenuate the luminance of the gray scale light at a specific rate or directly adjust the luminance of the gray scale light to a specific value through related operation software in the computer; the brightness detector can detect the brightness in the integrating sphere 1a in real time and transmit the brightness to a computer and other devices, and a tester collects related data for subsequent comparison and analysis. In a possible embodiment, the brightness adjuster is configured as an electric light attenuator 1c, and the electric light attenuator 1c is disposed between the gray scale light source body 1b and the light entrance aperture of the integrating sphere 1a to change the brightness of the light entering the integrating sphere 1 a; the brightness detector may be a brightness meter 1d fixed inside the integrating sphere 1 a.

In order to facilitate the installation and connection of the structures, the test device is further provided with an installation box body 7, the gray-scale light source 1 is arranged in the installation box body 7, the installation box body 7 is provided with a through hole for installing the diaphragm 6 in an adaptive manner, and when the direction of the gray-scale light source 1 is installed and debugged, attention is paid to that the gray-scale light can pass through the diaphragm hole 6a. The side wall of the mounting box body 7 provided with the diaphragm 6 is provided with a target clamping groove 24, and the test targets 2 are detachably arranged in the target clamping groove 24 so as to adapt to the requirements of different test items.

The requirements of the standard test method also include: when the test target plate 2 selects a spectrum neutral gray scale plate, the area and the position of the test window 2a are set to ensure that the whole gain of the tested electronic endoscope or the endoscope camera system is not changed in the gray scale brightness adjustment process, in order to meet the test requirements of various electronic endoscopes or endoscope camera systems on the market, the test equipment is provided with a plurality of spectrum neutral gray scale plates with different sizes of the test window 2a as the test target plate 2, and in order to adapt to the use requirements of the various spectrum neutral gray scale plates, the diaphragm 6 in the embodiment selects an iris diaphragm, and the diaphragm aperture 6a with variable size is adapted to the test window 2a with various different sizes.

Meanwhile, the target card slot 24 in this embodiment is further provided with a movably connected limiting member 25, the limiting member 25 is abutted with the edge of the target card slot 24, and the end portion of the limiting member 25 abutted with the target card slot 24 can be close to or far away from the edge of the target card slot 24. By moving the stopper 25, the position of the test target 2 in the target card slot 24 can be precisely adjusted so that the test window 2a thereon is aligned with the diaphragm aperture 6a. Specifically, the limiting member 25 may be a bolt screwed to the side wall and the bottom of the target clamping groove 24, and the left and right positions and the up and down heights of the test target 2 are changed by screwing the bolt; the side wall of the mark plate clamping groove 24, which is attached to the mounting box body 7, can be made of a magnetic material, the limiting piece 25 is a magnetic plate which is magnetically attracted to the side wall, and the magnetic force is set to be capable of changing the strength of the position of the magnetic plate by applying manpower.

In order to facilitate the installation and debugging of each device, the installation box body 7 is provided with a positioning plate 7a, the positioning plate 7a is connected with a first guide rail 8 and a second guide rail 10, the first guide rail 8 is rotationally connected with the positioning plate 7a, the background light source 3 is slidingly arranged on the first guide rail 8, and the first guide rail 8 is provided with scale marks for indicating the position of the background light source 3; the second guide rail 10 is fixedly connected with the positioning plate 7a, the mirror body clamp 4 is arranged on the second guide rail 10 in a sliding mode, and graduation marks used for indicating the position of the mirror body clamp 4 are arranged on the second guide rail 10. Before testing, changing the incidence angle of the background light emitted by the background light source 3 by rotating the first guide rail 8; the distance between the background light source 3 and the test target 2 is changed by sliding the background light source on the first guide rail 8, so that the brightness of the background light irradiated on the test target 2 is changed, and naturally, the brightness of the background light irradiated on the test target 2 can also be adjusted by adjusting the output power of the background light source 3. The distance between the mirror body clamp 4 and the test target 2 is changed by sliding the mirror body clamp on the second guide rail 10 so as to adapt to the requirements of a standard test method. The scale marks arranged on the first guide rail 8 and the second guide rail 10 provide great assistance for debugging of equipment, and improve the efficiency of equipment debugging before testing.

To further improve the efficiency of debugging the device before testing, the second guide rail 10 is perpendicular to the test target 2, so as to meet the testing requirements of most tested electronic endoscopes or endoscope camera systems, because the electronic endoscopes or endoscope camera systems produced by most manufacturers are in a conventional geometric shape, such as a cylinder, a cuboid, etc., and the optical axis of the imaging acquisition device is coincident with or parallel to the central axis of the entity.

The two first guide rails 8 are arranged at two sides of the second guide rail 10, and form the same included angle with the plane where the test target 2 is located, at this time, according to the principle of vector superposition, only the output power of the background light source 3 and the position of the background light source on the first guide rail 8 need to be adjusted, so that the debugging work of the device can be completed quickly. The embodiment also provides a simplest debugging method: under the above setting conditions, the positions of the background light sources 3 on the first guide rails 8 are set to be the same, and the output power of the background light sources 3 is set to be the same, so that the debugging process can be completed quickly on the premise of ensuring that the space uniformity of the illumination of the test target 2 meets the test requirement to the greatest extent. In some possible embodiments, the angle between the two first guide rails 8 and the plane in which the test target 2 lies is 45 °.

In some possible embodiments, the backlight 3 includes a lens 3a, a backlight body 3b and a light guide 3c, where an inlet end and an outlet end of the light guide 3c are respectively connected to the backlight body 3b and the lens 3a, a lens support 9 is slidably disposed on the first guide rail 8, the lens 3a is detachably disposed on the lens support 9, and the light guide 3c and the lens 3a are disposed so that the output backlight is more uniform. The background light source body 3b connected with the light guide beam 3c can be replaced according to different tested electronic endoscopes or endoscope shooting systems, and the optional background light source body 3b is provided with an LED cold light source, a xenon lamp cold light source, a halogen cold light source and the like.

Referring to fig. 1, 3 and 5, based on the requirements of a standard test method, that is, the area and the position of a test window 2a should ensure that the whole gain of the tested electronic endoscope or an endoscope camera system is not changed in the gray scale brightness adjustment process, considering that the area and the position of the test window 2a on a spectrum neutral gray scale plate are fixed, the method for ensuring that the position of the test window 2a does not affect the test result is to change the position of the tested electronic endoscope or the endoscope camera system, that is, change the position of a lens clamp 4, so a slidable sliding table 11 is arranged on a second guide rail 10 in the test device, a scissor type lifting table 12 is arranged at the top of the sliding table 11, and the lens clamp 4 is arranged at the top of the scissor type lifting table 12. Relative to the position of the test target 2, the sliding table 11 is used for changing the front and back positions of the mirror clamp 4, the scissor type lifting table 12 is used for changing the up and down positions of the mirror clamp 4, and the two translational degrees of freedom can be adjusted for the position of the mirror clamp 4 by moving the sliding table 11 or operating the scissor type lifting table 12.

In addition, in some possible embodiments, the top surface of the sliding table 11 is further provided with a sliding groove 11a, the bottom of the scissor lifting table 12 is provided with a sliding block 13, a screw rod 14 is rotatably arranged in the sliding groove 11a, the axis of the screw rod 14 is perpendicular to the length direction of the second guide rail 10, the end part of the screw rod 14 extends out of the sliding table 11, and the sliding block 13 is in wire connection with the screw rod 14. The screw 14 cooperates with the slider 13 for changing the left and right position of the mirror holder 4 with respect to the position of the test target 2, and the position of the mirror holder 4 is adjusted differently from the third translational degree of freedom described above.

In order to meet various medical detection requirements, the external design of electronic endoscopes or endoscope camera systems on the market is more and more diversified, such as bent cylindrical shape and the like, and to meet the test requirements of the devices, the test device is also provided with an angle adjusting plate arranged between the scissor type lifting table 12 and the endoscope clamp 4, and the angle adjusting plate comprises a top plate 15, a middle plate 16 and a bottom plate 17 which are sequentially connected, wherein one end of the top plate 15 and one end of the middle plate 16 are connected through a horizontal rotating shaft 18, the end part of the middle plate 16 far away from the horizontal rotating shaft 18 is connected with a vertical bolt 19 through a wire, and the top of the vertical bolt 19 is abutted against the bottom surface of the top plate 15; the middle plate 16 is connected with the bottom plate 17 through a vertical rotating shaft 21, a horizontal bolt 22 is screwed on the bottom plate 17, and the end part of the horizontal bolt 22 is abutted with the side surface of the middle plate 16. In particular, referring to fig. 4, one end of the bottom plate 17 may extend upward in the vertical direction to form a mounting plate 17a of the horizontal bolt 22, on the one hand, the mounting plate 17a is used for mounting the horizontal bolt 22, and on the other hand, the mounting plate 17a may also limit the middle plate 16, because the angular adjustment range of the device is generally not required to be too large during testing. The vertical bolts 19 are used for lifting or lowering the free end of the top plate 15, so that the free end of the top plate 15 can rotate around the horizontal rotating shaft 18 to change the pitching angle of the electronic endoscope or the endoscope photographing system clamped by the endoscope clamp 4; the horizontal bolt 22 is used to move the free end of the middle plate 16 in a horizontal direction, so that the free end of the middle plate 16 can rotate around the vertical rotating shaft 21 to change the included angle between the optical axis of the imaging acquisition device of the electronic endoscope or the endoscope camera system clamped by the endoscope clamp 4 and the plane in which the test target 2 is located.

In the process of vertically moving down the vertical bolt 19 due to the gravity of the top plate 15, the free end of the top plate 15 can freely fall, but in order to prevent the top plate 15 from falling too fast due to the dead weight, the electronic endoscope or the endoscope camera system clamped by the endoscope clamp 4 is damaged due to overlarge jolt when falling to stop, so that the rotation damping between the top plate 15 and the middle plate 16 can be adaptively improved, at the moment, a vertical reset spring 20 needs to be arranged between the top plate 15 and the middle plate 16, when the free end of the top plate 15 is jacked up by the vertical bolt 19, the vertical reset spring 20 is in a stretching state, and when the vertical bolt 19 is moved down, the free end of the top plate 15 is pulled to move down, so that the safety of the electronic endoscope or the endoscope camera system is ensured, the automatic adjustment of the pitching angle of the electronic endoscope or the endoscope camera system can be realized, and the operation difficulty is reduced.

Similarly, in implementation, the horizontal bolts 22 may be disposed on two opposite sides of the middle plate 16, and the middle plate 16 may be rotated by moving the two horizontal bolts 22 in the same direction, but such operation is too complicated, so in order to simplify the operation and reduce difficulty, in this embodiment, a horizontal return spring 23 is disposed between a side surface of the middle plate 16 and the bottom plate 17, and the horizontal return spring 23 and the horizontal bolts 22 are disposed on a set of opposite side surfaces of the middle plate 16 respectively.

The test equipment not only can meet the requirement of a standard test method on the space uniformity of the illumination of the test target plate 2, but also can avoid the problem that the minimum brightness of the gray-scale light cannot be adjusted to a preset minimum value according to the requirement because the background light enters the gray-scale light source 1 through the light outlet of the gray-scale light source 1 through the cooperation of the diaphragm 6 and the background light source 3; the first guide rail 8 and the scale marks on the first guide rail reduce the debugging difficulty of the background light incident angle and the distance between the background light source 3 and the test target 2; in the test equipment, the background light emitted by the plurality of background light sources 3 is directly incident on the test target plate 2, the space uniformity of illumination of the test target plate 2 is regulated by utilizing the principle of vector superposition, compared with the method of utilizing integrating sphere light homogenization in the prior art, the brightness loss of the background light in the test equipment is lower, and the total brightness after superposition is higher than the light brightness emitted by a single background light source 3, so that the adjustable range of the brightness value of the background illumination light of the test equipment is greatly improved, the test equipment can be suitable for the test of electronic endoscopes or endoscope camera systems with various different overall gains, and the applicability is improved.

The test target 2 in the test equipment is detachably connected with the mounting box body 7, is suitable for various test items, for example, when testing space response frequency, the test target 2 can be selected from sine wave star-shaped test targets, and when testing brightness response characteristics, signal to noise ratio and static image latitude, the test target 2 can be selected from spectrum neutral gray scale plates, and the difference is that in the former test process, the gray scale light source 1 does not need to be started. The locating part 25 on the target draw-in groove 24 and the structure such as scissors elevating platform 12, angle adjusting plate set up, have realized the accurate regulation of the position or the angle of test target 2 and mirror anchor clamps 4, have improved the accuracy of test result and this test equipment's suitability.

The foregoing is a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model and are intended to be comprehended within the scope of the present utility model.

Claims

1. The utility model provides a test equipment that electron endoscope and endoscope camera system used, includes gray level light source, test target, background light source, mirror body anchor clamps and image acquisition ware, the gray level light source with the background light source is located the both sides of test target, mirror body anchor clamps with the background light source is located the homonymy of test target, mirror body anchor clamps are used for centre gripping electron endoscope or endoscope camera system, its characterized in that:

the background light sources are at least two and are used for emitting background light; the background light is incident on the test target at an incidence angle, the space uniformity of illumination of the test target is less than or equal to 20 percent, and the incidence angle is greater than 0 degrees; the background light passing through the test standard plate is incident on the surface of the diaphragm plate;

2. The test apparatus for an electronic endoscope and an endoscope camera system according to claim 1, further comprising a mounting case, wherein a reticle clamping groove is provided on the mounting case, the test reticle is detachably provided in the reticle clamping groove, the gray-scale light source is provided in the mounting case, and the gray-scale light passes through the mounting case and irradiates on the test reticle.

3. The test device for the electronic endoscope and the endoscope camera system according to claim 2, wherein a positioning plate is arranged on the mounting box body, a first guide rail and a second guide rail are connected to the positioning plate, the first guide rail is rotationally connected with the positioning plate, the background light source is slidingly arranged on the first guide rail, and a scale mark for indicating the position of the background light source is arranged on the first guide rail; the second guide rail is fixedly connected with the positioning plate, the mirror body clamp is arranged on the second guide rail in a sliding mode, and scale marks used for indicating the position of the mirror body clamp are arranged on the second guide rail.

4. The apparatus according to claim 3, wherein the backlight comprises a lens, a backlight body and a light guide, the entrance end and the exit end of the light guide are respectively connected with the backlight body and the lens, a lens holder is slidably disposed on the first guide rail, and the lens is detachably disposed on the lens holder.

5. The test apparatus for an electronic endoscope and an endoscope camera system according to claim 3, wherein a slidable sliding table is arranged on the second guide rail, a scissor lift table is arranged on top of the sliding table, and the scope clamp is arranged on top of the scissor lift table.

6. The test device for an electronic endoscope and an endoscope camera system according to claim 5, wherein a sliding groove is formed in the top surface of the sliding table, a sliding block is arranged at the bottom of the scissor type lifting table, a screw rod is rotatably arranged in the sliding groove, and the screw rod is in wire connection with the sliding block so as to drive the sliding block to move in the sliding groove along a direction perpendicular to the second guide rail.

7. The apparatus for testing an electronic endoscope and an imaging system of an endoscope according to claim 6, further comprising an angle adjusting plate provided between said scissor lift and said scope clamp, comprising a top plate, a middle plate and a bottom plate connected in sequence,

8. The test apparatus for an electronic endoscope and an endoscopic imaging system according to claim 7, wherein a vertical return spring is provided between said top plate and said middle plate, and a horizontal return spring is provided between a side surface of said middle plate and said bottom plate.

9. The test device for an electronic endoscope and an endoscope camera system according to claim 3, wherein the target clamping groove is movably connected with a limiting piece, the limiting piece is abutted against the edge of the target clamping groove, and the end portion of the limiting piece abutted against the target clamping groove can be close to or far away from the edge of the target clamping groove.

10. The apparatus of any one of claims 3-9, wherein the second guide rail is perpendicular to the test target, the first guide rail is two, and the two first guide rails are disposed on two sides of the second guide rail and form the same included angle with a plane where the test target is located.