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

Abstract

The invention relates to the technical field of electronic equipment, in particular to a self-luminous square hole gray scale target of an electronic endoscope and a detection method.The self-luminous square hole gray scale target of the electronic endoscope comprises an adjustable light source unit, special ground glass, a gray scale coating, a constant current source and a power parameter control system, a square through hole is formed in the center of the special ground glass, the special ground glass is evenly covered with the gray scale coating, and a center adjustable light source arranged on the adjustable light source unit is attached to the square through hole. The power supply parameter control system is adjusted, so that the brightness, the spectrum curve and the color temperature of the center adjustable light source reach required effects, the electronic endoscope collects and analyzes the target, and the brightness response characteristic, the signal-to-noise ratio and the static image latitude of the electronic endoscope are measured; by implementing the target, better background space brightness uniformity in the measurement process can be ensured, a more uniform and stable gray scale measurement target is provided for an electronic endoscope detection device, and the measurement value is more accurate.

Description

Technical Field

[0001] The invention relates to the field of optical measurement technology, and in particular to a self-luminous square hole grayscale target of an electronic endoscope and a detection method thereof. Background Art

[0002] Minimally invasive surgery has attracted widespread attention due to its advantages such as small surgical incision and fast recovery after surgery. Therefore, electronic endoscopes have become one of the fastest growing products in the global medical device industry. While the frequency of use of electronic endoscopes in minimally invasive surgery has been continuously increasing, people have also gradually paid attention to the safety and effectiveness of endoscopes in clinical applications. Among them, the performance of electronic endoscopes for photoelectric parameters directly affects the safety of surgery and involves the personal safety of patients, which should be taken seriously.

[0003] At present, the grayscale target required for the measurement of the optoelectronic parameters of electronic endoscopes is illuminated by an external light source at a 45° angle from the side. The spatial brightness uniformity of the grayscale plate surface is poor, which seriously affects the measurement accuracy of the optoelectronic parameters related to the electronic endoscope.

[0004] The grayscale target used for the brightness response characteristics specified in the industry standard should have a spatial uniformity of no more than 20% for the grayscale target background illumination, a color temperature tolerance of ±10%, and a brightness temporal fluctuation of no more than 3.24×10 -SNR temp / 20 , where SNR temp is the random signal-to-noise ratio of the electronic endoscope under test. Due to the low spatial uniformity of the grayscale target background illumination, the measurement of related optoelectronic 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] The invention discloses a self-luminous square hole gray-scale target of an electronic endoscope and a detection method, aiming to solve the technical problems existing in the prior art.

[0006] The present invention adopts the following technical solutions: A self-luminous square hole grayscale target for an electronic endoscope comprises an adjustable light source unit, a special frosted glass, a grayscale coating, a constant current source and a power supply parameter control system respectively connected to the adjustable light source unit in sequence, wherein: A square through hole is provided at the center of the special frosted glass, and the grayscale coating is evenly covered on the special frosted glass. The central adjustable light source provided in the adjustable light source unit is 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 image is transmitted to the computer after acquisition.

[0007] In some embodiments, the adjustable light source unit is firmly connected to the dedicated frosted glass, and the dedicated frosted glass is configured to be glass with a uniform refractive index.

[0008] In some embodiments, the spectral transmittance range of the grayscale coating is set to be 16% to 20% of the coating or film.

[0009] In some embodiments, the grayscale coating is configured as a coating or film having a spectral transmittance of 18%.

[0010] 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.

[0011] In some embodiments, the power parameter control system is electrically connected to the adjustable light source unit via a wire, so that the brightness, spectrum curve and color temperature parameters of the central adjustable light source meet preset requirements.

[0012] In some embodiments, the adjustable light source unit includes the central adjustable light source and an outer ring light source located outside the central adjustable light source, the central adjustable light source is located on the central axis of the square through hole, and 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.

[0013] The present invention also discloses a detection method for a self-luminous square hole grayscale target of an electronic endoscope, which is performed by the self-luminous square hole grayscale target of an electronic endoscope as claimed in any one of the above claims, and the steps include: S1: attaching and fixing the adjustable light source unit on the special frosted glass, and making the central adjustable light source of the adjustable light source unit be 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 provided in the adjustable light source unit obtain a stable preset current; S3: adjusting the power parameter control system so that the central adjustable light source obtains a preset brightness, spectrum curve and color temperature; S4: adjusting the power parameter control system so that the lighting 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 tolerance parameters of the electronic endoscope according to a set formula. Beneficial Effects

[0014] The present invention discloses a self-luminous square hole grayscale target for an electronic endoscope and a detection method. Compared with the prior art, the present invention has the following advantages: The present invention adjusts the constant current source so that the central adjustable light source and the outer ring light source provided in the adjustable light source unit obtain stable preset current to illuminate the frosted glass and the grayscale coating, and then adjusts the power supply parameter control system so that the brightness, spectral curve and color temperature of the central adjustable light source reach the required effects. The electronic endoscope collects and analyzes the target, and realizes the measurement of the brightness response characteristics, signal-to-noise ratio and static image tolerance of the electronic endoscope.

[0015] The implementation of the target of the present invention can ensure better background space brightness uniformity during the measurement process, and provide a more uniform and stable measurement grayscale target for the electronic endoscope detection device, and the measurement value is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings: Figure 1 A schematic diagram of the technical solution structure of the self-luminous square hole grayscale target for an electronic endoscope provided in an embodiment of the present invention; Figure 2 A schematic diagram of the technical solution structure of the special frosted glass provided by an embodiment of the present invention; Figure 3 The present invention provides an electronic endoscope self-luminous square hole grayscale target detection process.

[0017] In the figure: Constant current source 1; power parameter control system 2; adjustable light source unit 3; central adjustable power supply 31; outer ring light source 32; special frosted glass 4; square through hole 41; grayscale coating 5; electronic endoscope 6; wire 7; computer 8. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the "including" mentioned in the specification and claims is an open term, so it should be interpreted as "including but not limited to".

[0019] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0020] like Figure 1 - Figure 3 As shown, the technical solution of the present invention: A self-luminous square hole grayscale target for an electronic endoscope comprises an adjustable light source unit 3, a special frosted glass 4, a grayscale coating 5, a constant current source 1 and a power supply parameter control system 2 respectively connected to the adjustable light source unit 3, wherein: A square through hole 41 is provided at the center of the special frosted glass 4, and the grayscale coating 5 is evenly covered on the special frosted glass 4. The central adjustable light source 31 provided in the adjustable light source unit 3 is 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 image is transmitted to the computer 8 after acquisition.

[0021] The first preferred embodiment disclosed by the present invention is as follows Figure 1-Figure 2 As shown: A self-luminous square hole grayscale target for an electronic endoscope comprises an adjustable light source unit 3, a special frosted glass 4, a grayscale coating 5, a constant current source 1 and a power supply parameter control system 2 respectively connected to the adjustable light source unit 3 in sequence.

[0022] A square through hole 41 is provided at the center of the special frosted glass 4, and the grayscale coating 5 is evenly covered on the special frosted glass 4. In the present embodiment, the square through hole 41 is a square, and the general size is 5mm*5mm or 7mm*7mm. The special frosted glass 4 and the grayscale coating 5 are both set to be square; the special frosted glass 4 is set to be glass with uniform refractive index.

[0023] The grayscale coating 5 is a coating or film with a spectral transmittance range of 16% to 20%, which is evenly covered on the special frosted glass 4; in this embodiment, a coating or film with a spectral transmittance of 18% is selected.

[0024] The adjustable light source unit 3 includes the central adjustable light source 31 and the outer ring light source 32 located outside the central adjustable light source 31, which is fixed on the plane of the dedicated 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 in the center of the square through hole 41; 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 adjustable brightness alone, and the outer ring light source is a set light source.

[0025] The constant current source 1 is electrically connected to the central adjustable power source 31 and the outer ring light source 32 of the adjustable light source unit 3 through the wire 7, so that the central adjustable light source 31 and the outer ring light source 32 always maintain a stable preset current.

[0026] The power parameter control system 2 is electrically connected to the adjustable light source unit 3 via a wire 7. Through the adjustment of the power parameter control system 2, the brightness, spectrum 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.

[0027] 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, and the image is transmitted to the computer 8 after acquisition. The computer 8 obtains the brightness response characteristics, signal-to-noise ratio and static image tolerance parameters of the electronic endoscope 6 after calculation.

[0028] The second preferred embodiment disclosed by the present invention is as follows Figure 3 As shown: A detection method for a self-luminous square hole grayscale target of an electronic endoscope is performed by the self-luminous square hole grayscale target of the electronic endoscope, and the steps include: S1: The central adjustable light source 31 in the adjustable light source unit 3 and the outer ring light source 32 located outside the central adjustable light source 31 are fixed on the plane of the special frosted glass 4 through fasteners, and the adjustable light source unit 3 is fixed on 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 of the special frosted glass 4; S2: adjusting the constant current source 1 so that the central adjustable light source 31 and the outer ring light source 32 provided in the adjustable light source unit 3 obtain a stable preset current; S3: adjusting the power parameter control system 2 so that the central adjustable light source 31 obtains a preset brightness, spectrum curve and color temperature; S4: adjusting the power parameter control system 2 so that the lighting brightness of the grayscale coating 5 meets the preset requirements; S5: Acquire a measurement image through the eyepiece of the electronic endoscope 6; S6: The computer 8 acquires the image and calculates the brightness response characteristics, signal-to-noise ratio and static image tolerance parameters of the electronic endoscope 6 according to a set formula.

[0029] Beneficial effects of the present invention: the spatial uniformity of the background illumination of the grayscale target of the present invention is improved from 80% of the prior art to 93%; the signal-to-noise ratio of the target at a normalized brightness of 0.707 is 41.1 dB, while the signal-to-noise ratio of the existing target at a normalized brightness of 0.707 is 39.9 dB.

[0030] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A self-luminous square hole grayscale target for 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 respectively connected to the adjustable light source unit, wherein: A square through hole is provided at the center of the special frosted glass, and the grayscale coating is evenly covered on the special frosted glass. The central adjustable light source provided in the adjustable light source unit is 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 image is transmitted to the computer after acquisition.

2. The electronic endoscope self-luminous square hole grayscale target according to claim 1, characterized in that: The adjustable light source unit is firmly connected to the special frosted glass, and the special frosted glass is set to be glass with uniform refractive index.

3. The electronic endoscope self-luminous square hole grayscale target according to claim 1, characterized in that: The spectral transmittance range of the grayscale coating is set to be 16% to 20% of the coating or film.

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

5. The electronic endoscope self-luminous square hole grayscale target according to claim 1, characterized in that: The constant current source is electrically connected to the adjustable light source unit through a wire, so that the adjustable light source unit always maintains a stable preset current.

6. The electronic endoscope self-luminous square hole grayscale target according to claim 1, characterized in that: The power parameter control system is electrically connected to the adjustable light source unit through a wire, so that the brightness, spectrum curve and color temperature parameters of the central adjustable light source meet preset requirements.

7. The electronic endoscope self-luminous square hole grayscale target according to claim 6, characterized in that: The adjustable light source unit includes the central adjustable light source and an outer ring light source located outside the central adjustable light source. The central adjustable light source is located on the central axis of the square through hole. 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.

8. A method for detecting a self-luminous square hole grayscale target in an electronic endoscope, characterized in that: The method is performed by the electronic endoscope self-luminous square hole grayscale target according to any one of claims 1 to 7, and the steps include: S1: attaching and fixing the adjustable light source unit on the special frosted glass, and making the central adjustable light source provided by the adjustable light source unit be located on the central axis of the square through hole provided by the special frosted glass; S2: Adjust the constant current source so that the central adjustable light source and the outer ring light source provided in the adjustable light source unit obtain a stable preset current; S3: adjusting the power parameter control system so that the central adjustable light source obtains a preset brightness, spectrum curve and color temperature; S4: adjusting the power parameter control system so that the lighting 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 tolerance parameters of the electronic endoscope according to a set formula.

Images