Electronic endoscope self-luminous square hole gray scale target and detection method

Abstract

The present application relates to the technical field of electronic equipment, and more particularly to a self-luminous square hole gray scale target for electronic endoscope and a detection method, which comprises a tunable light source unit, a special frosted glass, a gray scale coating and a constant current source and a power parameter control system connected with the tunable light source unit in turn, the center of the special frosted glass is provided with a square through hole, the gray scale coating is uniformly covered on the special frosted glass, and the center tunable light source of the tunable light source unit is attached to the square through hole; the power parameter control system is adjusted to make the brightness, spectral curve and color temperature of the center tunable light source reach the required effect, the target is collected and analyzed by the electronic endoscope, the brightness response characteristics, signal-to-noise ratio and static image tolerance of the electronic endoscope are measured, the implementation of the target can ensure better background space brightness uniformity in the measurement process, and a more uniform and stable measurement gray scale target is provided for the electronic endoscope detection device, and the measurement value is more accurate.

Description

Technical Field

[0001] This invention relates to the field of optical measurement technology, and in particular to a self-illuminating square-hole grayscale target for electronic endoscopes and a detection method thereof. Background Technology

[0002] Minimally invasive surgery has gained widespread attention due to its advantages such as small surgical incisions and rapid postoperative recovery, making electronic endoscopes one of the fastest-growing products in the global medical device industry. As the frequency of use of electronic endoscopes in minimally invasive surgery continues to increase, people are also paying increasing attention to the safety and effectiveness of endoscopes in clinical applications. In particular, the photoelectric parameters of electronic endoscopes directly affect surgical safety and involve patient safety, thus deserving serious consideration.

[0003] Currently, the grayscale target required for measuring photoelectric parameters of electronic endoscopes is illuminated by an external light source from a 45° angle. However, the spatial brightness uniformity of the grayscale target surface is poor, which seriously affects the accuracy of measuring relevant photoelectric parameters of electronic endoscopes.

[0004] The grayscale target used for the brightness response characteristics specified in industry standards should have a spatial uniformity of background illumination not exceeding 20%, a color temperature tolerance of ±10%, and a brightness temporal fluctuation not exceeding 3.24 × 10⁻⁶. -SNR temp / 20 SNR temp The random signal-to-noise ratio of the tested electronic endoscope is shown. Due to the low spatial uniformity of the grayscale target background illumination, the measurement of relevant photoelectric parameters of the electronic endoscope is inaccurate, which in turn affects the safety of electronic endoscopic surgery and the development of domestic production quality. Summary of the Invention

[0005] This invention discloses a self-illuminating square-hole grayscale target for electronic endoscopes and a detection method thereof, aiming to solve the technical problems existing in the prior art.

[0006] The present invention adopts the following technical solution:

[0007] A self-illuminating square-hole grayscale target for an electronic endoscope includes an adjustable light source unit, a special frosted glass, a grayscale coating, and a constant current source and a power parameter control system respectively connected to the adjustable light source unit in sequence.

[0008] The special frosted glass has a square through hole in the center, and the grayscale coating is uniformly covered on the special frosted glass. The adjustable light source unit has a central adjustable light source attached to the square through hole. The electronic endoscope eyepiece is located at a preset position in front of the center of the square through hole and is connected to a computer so that the acquired image is transmitted to the computer.

[0009] In some embodiments, the adjustable light source unit is fastened to the dedicated frosted glass, and the dedicated frosted glass is a glass with a uniform refractive index.

[0010] In some embodiments, the grayscale coating is a paint or film with a spectral transmittance range of 16% to 20%.

[0011] In some embodiments, the grayscale coating is a paint or film with a spectral transmittance of 18%.

[0012] In some embodiments, the constant current source is electrically connected to the adjustable light source unit via a wire, so that the adjustable light source unit always maintains a stable preset current.

[0013] In some embodiments, the power parameter control system is electrically connected to the adjustable light source unit via wires, so that the brightness, spectral curve, and color temperature parameters of the central adjustable light source meet preset requirements.

[0014] In some embodiments, the adjustable light source unit includes the central adjustable light source and an outer ring light source located around the central adjustable light source. The central adjustable light source is located on the central axis of the square through hole, and the center of the outer ring light source coincides with the center of the central adjustable light source, so that the outer ring light source illuminates the grayscale coating through the frosted glass.

[0015] This invention also discloses a method for detecting a self-illuminating square-hole grayscale target of an electronic endoscope, performed by the self-illuminating square-hole grayscale target of the electronic endoscope as described in any one of the preceding claims, comprising the following steps:

[0016] S1: The adjustable light source unit is attached and fixed on the special frosted glass, and the central adjustable light source of the adjustable light source unit is located on the central axis of the square through hole of the special frosted glass.

[0017] S2: Adjust the constant current source so that the central adjustable light source and the outer ring light source of the adjustable light source unit can obtain a stable preset current;

[0018] S3: Adjust the power supply parameters control system to enable the central adjustable light source to acquire preset brightness, spectral curve and color temperature;

[0019] S4: Adjust the power supply parameters to control the system so that the illumination brightness of the grayscale coating meets the preset requirements;

[0020] S5: Electronic endoscope acquires measurement images;

[0021] S6: The computer acquires the image and calculates the brightness response characteristics, signal-to-noise ratio, and static image latitude parameters of the electronic endoscope according to the set formula. Beneficial effects

[0022] This invention discloses a self-illuminating square-hole grayscale target for electronic endoscopes and a detection method thereof. Compared with the prior art, this invention has the following advantages:

[0023] This invention adjusts the constant current source to enable the central adjustable light source and outer ring light source of the adjustable light source unit to obtain a stable preset current to illuminate the frosted glass and grayscale coating. Then, the power supply parameter control system is adjusted to make the brightness, spectral curve and color temperature of the central adjustable light source reach the required effect. The electronic endoscope collects and analyzes the target, realizing the measurement of the brightness response characteristics, signal-to-noise ratio and static image tolerance of the electronic endoscope.

[0024] The implementation of the target of this invention can ensure better uniformity of background spatial brightness during the measurement process, providing a more uniform and stable grayscale target for electronic endoscope detection devices, resulting in more accurate measurement values. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, constituting a part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention; in the accompanying drawings:

[0026] Figure 1 A schematic diagram of the technical solution structure of the self-illuminating square-hole grayscale target for an electronic endoscope provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the technical solution structure of the special frosted glass provided in the embodiment of the present invention;

[0028] Figure 3 The electronic endoscope self-illuminating square hole grayscale target detection process provided in the embodiments of the present invention.

[0029] In the picture:

[0030] 1. Constant current source; 2. Power parameter control system; 3. Adjustable light source unit; 31. Central adjustable power supply; 32. Outer ring light source; 4. Special frosted glass; 41. Square through hole; 5. Gray scale coating; 6. Electronic endoscope; 7. Wires; 8. Computer. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "comprising" as used in the specification and claims is an open-ended term and should therefore be interpreted as "comprising but not limited to".

[0032] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] like Figure 1 - Figure 3 As shown, the technical solution of the present invention is as follows:

[0034] A self-illuminating square-hole grayscale target for an electronic endoscope includes an adjustable light source unit 3, a special frosted glass 4, a grayscale coating 5, and a constant current source 1 and a power parameter control system 2, which are sequentially bonded and connected to the adjustable light source unit 3.

[0035] The special frosted glass 4 has a square through hole 41 in the center, and the grayscale coating 5 is uniformly covered on the special frosted glass 4. The adjustable light source unit 3 has a central adjustable light source 31 attached to the square through hole 41. The electronic endoscope eyepiece is located at a preset position in front of the center of the square through hole 41 and is connected to the computer 8 so that the acquired image is transmitted to the computer 8.

[0036] The first preferred embodiment disclosed in this invention, such as Figures 1-2 As shown:

[0037] An electronic endoscope self-illuminating square-hole grayscale target includes an adjustable light source unit 3, a special frosted glass 4, a grayscale coating 5, and a constant current source 1 and a power parameter control system 2, which are connected in sequence to the adjustable light source unit 3.

[0038] The special frosted glass 4 has a square through hole 41 in the center, and the gray scale coating 5 uniformly covers the special frosted glass 4. In this embodiment, the square through hole 41 is square, and the size is generally selected as 5mm*5mm or 7mm*7mm. The special frosted glass 4 and the gray scale coating 5 are both set as square. The special frosted glass 4 is set as glass with uniform refractive index.

[0039] The grayscale coating 5 uses a paint or film with a spectral transmittance range of 16% to 20%, which is uniformly covered on the special frosted glass 4; in this embodiment, a paint or film with a spectral transmittance of 18% is selected.

[0040] The adjustable light source unit 3 includes a central adjustable light source 31 and an outer ring light source 32 located around the central adjustable light source 31. It is fixed to the plane of the special frosted glass 4 by fasteners. The central adjustable light source 31 is located on the central axis of the square through hole 41 and fits into the center of the square through hole 41. The center of the outer ring light source 32 coincides with the center of the central adjustable light source 31. The central adjustable light source 31 is a light source with individually adjustable brightness, and the outer ring light source is a set light source.

[0041] The constant current source 1 is electrically connected to the center adjustable power supply 31 and the outer ring light source 32 of the adjustable light source unit 3 via wires 7, so that the center adjustable light source 31 and the outer ring light source 32 always maintain a stable preset current.

[0042] The power parameter control system 2 is electrically connected to the adjustable light source unit 3 via wire 7. By adjusting the power parameter control system 2, the brightness, spectral curve and color temperature parameters of the central adjustable light source 31 meet the preset test requirements, and the light passes through the special frosted glass 4 to illuminate the grayscale coating 5.

[0043] The eyepiece of the electronic endoscope 6 is located at a preset position in front of the square through hole 41. In this embodiment, the eyepiece of the electronic endoscope 6 is located on the central axis in front of the square through hole 41. The electronic endoscope 6 is connected to the computer 8. After acquiring the image, it is transmitted to the computer 8. The computer 8 calculates and obtains the brightness response characteristics, signal-to-noise ratio and static image latitude parameters of the electronic endoscope 6.

[0044] The second preferred embodiment disclosed in this invention, such as Figure 3 As shown:

[0045] A method for detecting a self-illuminating square-hole grayscale target of an electronic endoscope, performed by the self-illuminating square-hole grayscale target of the electronic endoscope, includes the following steps:

[0046] S1: The central adjustable light source 31 and the outer ring light source 32 located around the central adjustable light source 31 in the adjustable light source unit 3 are fixed to the plane of the special frosted glass 4 by fasteners. The adjustable light source unit 3 is attached and fixed to the special frosted glass 4, and the central adjustable light source 31 of the adjustable light source unit 3 is located on the central axis of the square through hole 41 provided in the special frosted glass 4.

[0047] S2: Adjust the constant current source 1 so that the central adjustable light source 31 and the outer ring light source 32 of the adjustable light source unit 3 can obtain a stable preset current;

[0048] S3: Adjust the power supply parameters control system 2 so that the central adjustable light source 31 can obtain preset brightness, spectral curve and color temperature;

[0049] S4: Adjust the power supply parameters to control system 2 so that the illumination brightness of grayscale coating 5 meets the preset requirements;

[0050] S5: Acquire measurement images through the 6-eyepiece electronic endoscope;

[0051] S6: Computer 8 acquires the image and calculates the brightness response characteristics, signal-to-noise ratio, and static image latitude parameters of the electronic endoscope 6 according to the set formula.

[0052] The beneficial effects of the present invention are as follows: the spatial uniformity of the grayscale target background illumination of the present invention is increased from 80% to 93% in the prior art; the signal-to-noise ratio of the target at a normalized brightness of 0.707 is 41.1dB, while the signal-to-noise ratio of the existing target at a normalized brightness of 0.707 is 39.9dB.

[0053] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A self-illuminating square-hole grayscale target for an electronic endoscope, characterized in that: It includes an adjustable light source unit, a special frosted glass, a grayscale coating, and a constant current source and a power parameter control system connected in sequence to the adjustable light source unit. The special frosted glass has a square through hole in the center, and the grayscale coating is uniformly covered on the special frosted glass. The adjustable light source unit includes a central adjustable light source and an outer ring light source located around the central adjustable light source. The central adjustable light source is attached to the square through hole, and the center of the outer ring light source coincides with the center of the central adjustable light source, so that the outer ring light source illuminates the grayscale coating through the frosted glass. The constant current source is electrically connected to the central adjustable power supply and the outer ring light source of the adjustable light source unit through wires, so that the central adjustable light source and the outer ring light source always maintain a stable preset current. The power parameter control system is electrically connected to the adjustable light source unit via wires, so that the brightness, spectral curve and color temperature parameters of the central adjustable light source meet the preset requirements. The electronic endoscope eyepiece is located at a preset position in front of the center of the square through-hole and is connected to a computer so that the acquired image is transmitted to the computer, and the computer calculates and obtains the brightness response characteristics, signal-to-noise ratio and static image latitude parameters of the electronic endoscope.

2. The self-illuminating square-hole grayscale target for electronic endoscopes according to claim 1, characterized in that: The adjustable light source unit is fastened to the special frosted glass, and the special frosted glass is made of glass with a uniform refractive index.

3. The self-illuminating square-hole grayscale target for electronic endoscopes according to claim 1, characterized in that: The grayscale coating is a paint or film with a spectral transmittance range of 16% to 20%.

4. The self-illuminating square-hole grayscale target for electronic endoscopes according to claim 3, characterized in that: The grayscale coating is set as a paint or film with a spectral transmittance of 18%.

5. A method for detecting a self-illuminating square-hole grayscale target in an electronic endoscope, characterized in that: Performed by the self-illuminating square-hole grayscale target of the electronic endoscope according to any one of claims 1-4, the steps include: S1: The adjustable light source unit is attached and fixed on the special frosted glass, and the central adjustable light source of the adjustable light source unit is located on the central axis of the square through hole of the special frosted glass. S2: Adjust the constant current source so that the central adjustable light source and the outer ring light source of the adjustable light source unit can obtain a stable preset current; S3: Adjust the power supply parameters control system to enable the central adjustable light source to acquire preset brightness, spectral curve and color temperature; S4: Adjust the power supply parameters to control the system so that the illumination brightness of the grayscale coating meets the preset requirements; S5: Electronic endoscope acquires measurement images; S6: The computer acquires the image and calculates the brightness response characteristics, signal-to-noise ratio, and static image latitude parameters of the electronic endoscope according to the set formula.

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