CN214965405U - Dark adaptation function inspection device of quick rod cell - Google Patents
Dark adaptation function inspection device of quick rod cell Download PDFInfo
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- CN214965405U CN214965405U CN202120781427.5U CN202120781427U CN214965405U CN 214965405 U CN214965405 U CN 214965405U CN 202120781427 U CN202120781427 U CN 202120781427U CN 214965405 U CN214965405 U CN 214965405U
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Abstract
The utility model discloses a device for checking dark adaptation function of rapid rod cells, which comprises a box body, wherein a bright field assembly, a dark sighting mark assembly and a comprehensive processing system are arranged in the box body, the bright field assembly comprises a field shell, the field shell is of a cavity structure, a reflecting plate mounting opening is formed in one side of the cavity, and a dark sighting mark window is formed in the side wall of the field shell opposite to the reflecting plate mounting opening; a front reflector mounted on the reflector mounting opening of the viewing field shell for blocking the reflector mounting opening to make the viewing field shellTo form a closed whole; the inspector identifies the dark-vision mark, and drives the motor to rotate after the dark-vision mark is identified correctly, so as to drive the dimming sheet mounting disc to rotate, and the dimming sheet in front of the display screen is changed. Use 10‑3Or 10‑4cd/m2Compared with the classical dark adaptive threshold inspection, the brightness of the method shortens the inspection time; the brightness can only stimulate the rod cells, and the detection of the rod cell dark adaptation function closely related to the night visual function is realized.
Description
Technical Field
The utility model belongs to the field of medical equipment, concretely relates to dark adaptation function inspection device of quick sight rod cell.
Background
The decline of night vision function is an early manifestation of many ophthalmic diseases, and the dark adaptation function is an important index of night vision function. Accurate assessment of the dark adaptation function is of great significance in early diagnosis of ophthalmic diseases such as retinal pigment degeneration and glaucoma. The classical dark adaptation threshold test is accurate, but takes a long time, more than half an hour (5 minutes of light adaptation and 30 minutes of dark adaptation), so that clinical application is relatively limited. In the last century, Chinese scholars propose a rapid dark adaptation inspection method, which has the advantages of short time consumption and 1-minute dark adaptation detection after 2-minute bright adaptation, but the rapid dark adaptation inspection method can only detect the dark adaptation process of cone cells and cannot reflect the dark adaptation process of rod cells closely related to night visual functions. Therefore, the above fast dark adaptation examination method has a very high false negative rate in the night vision function decline-related ophthalmic disease diagnosis, and cannot meet the clinical reality requirement.
SUMMERY OF THE UTILITY MODEL
The utility model provides a quick rod cell dark adaptation function inspection device to solve the problem that false negative rate is high in the diagnosis of ophthalmic diseases.
The utility model discloses a quick dark adaptation function inspection device of rod cell that realizes through following means, include
The box body is provided with a plurality of air inlets,
a bright field component, a dark visual mark component and a comprehensive processing system are arranged in the box body,
the bright field assembly comprises
The field of view shell is of a cavity structure, a reflecting plate mounting opening is formed in one side of the cavity, and a dark sighting mark window is formed in the side wall of the field of view shell, which is opposite to the reflecting plate mounting opening;
the front reflector is arranged on the reflector mounting opening of the view field shell and used for blocking the reflector mounting opening so as to enable the view field shell to be a closed whole;
the observation window is connected to the front reflecting plate and used for observing the inside of the view field shell from the outside of the view field shell;
the LED lamp panel is connected to one side of the front reflector plate close to the interior of the view field shell;
the invisible mark component comprises
The motor frame is connected to the inner wall of the box body;
the motor is connected to the motor frame, and the output shaft of the motor is connected with the dimmer mounting plate and is used for driving the dimmer mounting plate to rotate;
the device comprises a dimmer mounting disc, a plurality of dimmer holes are formed in the dimmer mounting disc along the circumference of the mounting disc, and the dimmer holes are connected with a dimmer;
the dimmer is used for changing the image brightness of the display screen;
the display screen is connected to the motor frame and used for displaying the dark sighting mark;
and the LED lamp panel, the motor and the display screen are all in electric signal connection with the comprehensive processing system.
The observation window, the dark sighting mark window and the display screen are positioned on the same straight line.
One side of the visual field shell dark sighting mark window is also connected with a camera, and the camera faces the observation window and is used for observing human eye images in the observation window.
The motor frame is also connected with a photoelectric switch, and the photoelectric switch is directly opposite to the dimmer mounting plate so as to detect the revolution of the dimmer mounting plate.
The light reduction sheet is an absorption type neutral density light reduction sheet.
And a narrow-band filter is pasted on the display screen.
The dimmer is divided into two types, and the brightness of the dark sighting mark of the display screen is respectively reduced to 10-3cd/m2And 10-4cd/m2。
The narrow band filter allows blue and green with the wavelength of 512nm to pass through.
The beneficial effects of the utility model reside in that: 1. arrows in four directions of "×", "→", "↓" and "←" are used as the sighting marks for dark adaptation inspection, so that the false negative rate of the facula sighting mark inspection is reduced, and the probability that an inspector guesses the sighting marks when two sighting marks of "+" and "=" are selected in the past is also reduced.
2. Use 10-3To 10-4cd/m2The brightness of the dark optotype is checked as the brightness of the dark adaptation. On the one hand, compared with the classical dark adaptation threshold value inspection, the inspection time is shortened; on the other hand, compared with the method for rapidly detecting dark adaptation provided by scholars in China in the last century, the brightness only can stimulate the rod cells and cannot stimulate the cone cells, and the detection of the dark adaptation function of the rod cells closely related to the night vision function is realized.
3. The 512nm blue-green dark adaptation inspection dark sighting mark is used, so that the influence of the image after the vision on the inspection result is reduced.
4. The camera is used for collecting the eye picture of the examinee, the eye opening/closing condition of the examinee in the photopic adaptation stage is automatically analyzed, and false negative caused by conscious or unconscious eye closing of the examinee in the photopic adaptation process to the examination result is reduced.
Drawings
FIG. 1 is a schematic view of a device for examining dark adaptation function of fast rod-like cells;
FIG. 2 is a schematic view of a bright field assembly;
FIG. 3 is a schematic diagram of a hidden logo structure;
FIG. 1 shows a box body; 2. a bright field assembly; 2-1, a field of view shell; 2-2, a front reflector; 2-3, an observation window; 2-4, an LED lamp panel; 2-5, a camera; 3. a hint component; 3-1, a motor frame; 3-2, a motor; 3-3, a display screen; 3-4, a dimmer mounting plate; 3-5, a dimmer sheet; 3-6, photoelectric switch; 4. a comprehensive processing system; 5. and a power supply module.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
[ example 1 ]
As shown in FIGS. 1 to 3, a device for examining dark adaptation function of rapid rod cells comprises
The box body 1 is provided with a plurality of grooves,
a bright visual field component 2, a dark visual target component 3 and a comprehensive processing system 4 are arranged in the box body 1,
the bright field assembly 2 comprises
The visual field shell 2-1 is of a cavity structure, a reflecting plate mounting opening is formed in one side of the cavity, and a dark sighting mark window is formed in the side wall of the visual field shell 2-1, which is opposite to the reflecting plate mounting opening;
the front reflector 2-2 is arranged on the reflector mounting opening of the view field shell 2-1 and used for blocking the reflector mounting opening so as to enable the view field shell 2-1 to be a closed whole;
the observation window 2-3 is connected to the front reflector 2-2 and used for observing the inside of the view field shell 2-1 from the outside of the view field shell 2-1;
the LED lamp panel 2-4 is connected to one side, close to the interior of the view field shell 2-1, of the front reflector 2-2;
the scotopic vision module 3 comprises
The motor frame 3-1 is connected to the inner wall of the box body 1;
the motor 3-2 is connected to the motor frame 3-1, and the output shaft of the motor 3-2 is connected with the dimmer mounting disc 3-4 and used for driving the dimmer mounting disc 3-4 to rotate;
the light-reducing piece mounting disc 3-4 is provided with a plurality of light-reducing piece holes along the circumference of the mounting disc, and the light-reducing piece holes are connected with light-reducing pieces 3-5;
the dimmer 3-5 is used for changing the image brightness of the display screen 3-3;
the display screen 3-3 is connected to the motor frame 3-1 and used for displaying the dark sighting mark;
the comprehensive processing system 4, the LED lamp panels 2-4, the motor 3-2 and the display screen 3-3 are all in electric signal connection with the comprehensive processing system 4.
As shown in fig. 1, the bright field assembly 2, the dark mark assembly 3 and the comprehensive processing system 4 are all in the box body 1 and are connected to the inner wall of the box body 1 at fixed positions, and the inner wall of the box body 1 is also connected with a power supply module 5 for supplying power to the bright field assembly 2, the dark mark assembly 3 and the comprehensive processing system 4. The integrated processing system 4 is a conventional processor.
As shown in fig. 2, the bright field assembly 2 includes a hemispherical field housing 2-1, which is a Goldmann hemisphere, the field housing 2-1 is a hollow cavity, one side of which is bottomless, forming a reflector mounting opening, a front reflector 2-2 is connected to the reflector mounting opening, and the front reflector 2-1 is sealed off from the bottomless side of the field housing 2-1, a viewing window 2-3 is connected to the front reflector 2-2 for viewing a scene in the field housing 2-1 through the viewing window 2-3, and a scotopic window is opened on a wall of the field housing 2-1 opposite to the viewing window 2-3 for viewing a scotopic outside the bright field assembly 2.
Meanwhile, the observation window 2-3 covers the eyes of the examiner, and the test is prevented from being influenced by external light.
The front reflector 2-2 is also connected with a plurality of LED lamp panels 2-4 on one side close to the inside of the view field shell 2-1, and is used for illuminating the inside of the view field shell 2-1 to provide a bright view field.
The view field shell 2-1 and the front reflector 2-2 are made of aluminum plates, a barium sulfate coating is sprayed inside the view field shell 2-1 and used for uniform reflection of light, and black matte polyurethane enamel is sprayed outside the view field shell; the observation window is formed by milling black polytetrafluoroethylene materials, and the comfort is improved by sticking sponge on the face contacting surface of the observation window. The LED lamp panel 2-4 adopts four warm white LED scattering lamp beads for light emitting.
As shown in fig. 3, the scotopic sign assembly 3 comprises a motor frame 3-1 connected to the box body 1, a motor 3-2 and a display screen 3-3 are connected to the motor frame 3-1, an output shaft of the motor 3-2 is connected to a disk-shaped dimmer mounting plate 3-4, and the dimmer mounting plate 3-4 is rotated by the motor 3-2.
The dimmer mounting plate 3-4 is provided with a plurality of dimmer holes along the circumference, wherein the dimmer holes are connected with dimmers 3-5 with different parameters, when the dimmer 3-5 on the dimmer mounting plate 3-4 rotates to the front of the display screen 3-3, the dimmer 3-5 cuts the brightness of the dark sighting mark displayed on the display screen 3-3, and the dimmer 3-5 with different parameters is positioned in front of the display screen 3-3 by rotating the dimmer mounting plate 3-4, so that the brightness of the dark sighting mark is cut to different degrees.
The display screen 3-3 adopts a 0.77-inch miniature high-resolution AMOLED screen, the resolution is 1280 multiplied by 1024, the pixel dot pitch is 12 mu m, RGB vertical strip pixels are arranged, 8 bits/256 gray levels are achieved, the brightness is larger than or equal to 150cd/m2, the uniformity is larger than 85%, the display area is 15.36 multiplied by 12.29mm, and the AMOLED screen has the characteristics of self-luminescence, wide viewing angle and low power consumption.
The motor 3-2 adopts a 28-phase integrated stepping motor and 2-phase windings, has a 1.8-degree step angle, a static moment of 0.5kgcm, a working voltage of 10-30V DC and a rated current of 1A, and has overcurrent, overvoltage and undervoltage protection functions.
The comprehensive processing system 4 processes and controls signals of the LED lamp panels 2-4, the motor 3-2 and the display screen 3-3 to brighten the LED lamp panels 2-4 and control the motor 3-2 to rotate so as to change the style of the dark sighting marks on the display screen 3-3.
[ example 2 ]
On the basis of the embodiment 1, as shown in fig. 1, the observation window 2-3, the dark sighting mark window and the display screen 3-3 are positioned on the same straight line.
The observation window 2-3, the dark sighting mark window and the display screen 3-3 are positioned on the same straight line, so that the dark sighting mark on the display screen 3-3 can be seen from the observation window 2-3.
As shown in FIG. 1, the display screen 3-3 is located behind the hidden sighting mark window, and the hidden sighting mark displayed on the rear display screen 3-3 can be seen through the transparent hidden sighting mark window when the display screen is seen from the inside of the image of the observation window 2-3.
One side of the dark sighting mark window of the view field shell 2-1 is also connected with a camera 2-5, and the camera 2-5 faces the observation window 2-3 and is used for observing the human eye image in the observation window 2-3.
The inner wall of the field of view shell 2-1 at one side of the blind sighting mark window is also connected with a camera 2-5, specifically, a camera cavity protruding out of the shell can be arranged on the wall of the field of view shell 2-1, the camera 2-5 is placed in the camera cavity, and the camera 2-5 faces the observation window so as to detect the human eye image of the examiner in the observation window.
The camera is used for collecting the eye picture of the examinee, the eye opening/closing condition of the examinee in the photopic adaptation stage is automatically analyzed, the examinee is reminded of opening the eyes through voice, and false negative caused by conscious or unconscious eye closing of the examinee in the photopic adaptation process to the examination result is reduced.
The motor frame 3-1 is also connected with a photoelectric switch 3-6, and the photoelectric switch 3-6 is directly opposite to the dimmer mounting plate 3-4 so as to detect the number of revolutions of the dimmer mounting plate 3-4.
The photoelectric switch 3-6 faces the dimmer mounting plate 3-4, detects and detects the rotation of the dimmer mounting plate 3-4 by setting an origin, thereby determining which dimmer 3-5 is in front of the display screen 3-3 and finally determining the degree to which the brightness of the dim sight is reduced.
The light-reducing sheets 3-5 are absorption type neutral density light-reducing sheets.
The transmission of the darkened optotypes was varied using absorbing neutral density shaders of different optical densities (i.e., attenuation coefficients) to achieve 10-3Or 10-4cd/m2Switching of the equal brightness levels.
And a narrow-band filter is attached to the display screen 3-3.
The dimmer 3-5 is divided into two types, and the brightness of the dark sighting target of the display screen 3-3 is respectively reduced to 10-3cd/m2And 10-4cd/m2。
On the one hand, compared with the classical dark adaptation threshold value inspection, the inspection time is shortened; on the other hand, compared with the method for rapidly detecting dark adaptation provided by scholars in China in the last century, the brightness only can stimulate the rod cells and cannot stimulate the cone cells, and the detection of the dark adaptation function of the rod cells closely related to the night vision function is realized
The narrow band filter allows blue and green with the wavelength of 512nm to pass through.
The narrow-band filter adopts a narrow-band filter with a central wavelength of 512nm, a half-band width of 25nm, a diameter of 17.5mm, a thickness of 1.1mm and a peak value passing rate of 60-70 percent
The 512nm blue-green dark adaptation inspection dark sighting mark is used, so that the influence of the image after the vision on the inspection result can be reduced.
[ example 3 ]
On the basis of the embodiment 2, the use method of the fast rod cell dark adaptation function checking device,
in the bright adaptation stage, the LED lamp panel 2-4 is started to illuminate the inside of the field shell 2-1 to provide a bright field, and an inspector looks at the inside of the field shell 2-1 through the observation window 2-3 to perform a bright adaptation process;
in the dark adaptation stage, the LED lamp panel 2-4 is closed, the display screen 3-3 is started, the dark sighting mark is displayed on the display screen 3-3, the inspector observes the dark sighting mark processed by the dimmer 3-5 and the narrow-band filter from the observation window 2-3 and through the dark sighting mark window, the dark adaptation process is carried out,
in the dark adaptation test stage, the dark sighting mark displayed on the display screen 3-3 changes, an inspector identifies the dark sighting mark, and drives the motor 3-2 to rotate after the identification is correct, so as to drive the dimmer mounting disc 3-4 to rotate, and the dimmer 3-5 in front of the display screen 3-3 changes, so that the brightness of the dark sighting mark is changed; then, the inspector recognizes the dark sighting mark with changed brightness again, and the cameras 2-5 collect eye images of the inspector to judge whether the observer closes the eyes or not and remind the inspector to open the eyes when the inspector closes the eyes.
The display screen 3-3 selects arrows in four directions of "arp", "→", "↓" and "←" as dark optotypes.
During testing, a detector is made to adapt to the test clearly, the detector pastes the head into the observation window 2-3 and observes the inside of the view field shell 2-1 by eyes, and the comprehensive processing system 4 opens the LED lamp panel 2-4 to illuminate the inside of the view field shell 2-1.
And then entering a dark adaptation stage, closing the LED lamp panel 2-4 by the comprehensive processing system 4, opening the display screen 3-3, displaying a dark sighting mark on the display screen 3-3, filtering the color of the dark sighting mark through a narrow-band filter, and observing the dark sighting mark by an inspector after the brightness of the dimmer is reduced.
During detection, the display screen 3-3 selects one or more of four directional arrows "arp", "→", "↓" and "←" for display, inquires the observed dark sighting mark to the inspector, confirms whether the observer correctly recognizes the dark sighting mark, and tests for multiple times after correct recognition;
the motor 3-2 rotates to rotate the other dimmer 3-5 with optical density to the front of the display screen 3-3, the brightness of the dark sighting mark observed by the detector is changed, and the dark sighting mark is tested again, so that the dark adaptive capacity of the rod cells of the detector is known.
Arrows in four directions of "×", "→", "↓" and "←" are used as the sighting marks for dark adaptation inspection, so that the false negative rate of the facula sighting mark inspection is reduced, and the probability that an inspector guesses the sighting marks when two sighting marks of "+" and "=" are selected in the past is also reduced.
Claims (8)
1. A device for checking the dark adaptation function of a rapid rod cell is characterized in that: comprises that
A box body (1),
a bright field component (2), a dark mark component (3) and a comprehensive processing system (4) are arranged in the box body (1),
the bright field assembly (2) comprises
The visual field shell (2-1), the visual field shell (2-1) is of a cavity structure, a reflecting plate mounting opening is formed in one side of the cavity, and a dark sighting mark window is formed in the side wall of the visual field shell (2-1) on the opposite side of the reflecting plate mounting opening;
the front reflector (2-2) is arranged on the reflector mounting opening of the view field shell (2-1) and used for blocking the reflector mounting opening so as to enable the view field shell (2-1) to be a closed whole;
the observation window (2-3) is connected to the front reflecting plate (2-2) and is used for observing the inside of the view field shell (2-1) from the outside of the view field shell (2-1);
the LED lamp panel (2-4) is connected to one side, close to the interior of the view field shell (2-1), of the front reflector (2-2);
the scotopic mark component (3) comprises
The motor frame (3-1) is connected to the inner wall of the box body (1);
the motor (3-2) is connected to the motor frame (3-1), and an output shaft of the motor (3-2) is connected with the dimmer mounting disc (3-4) and used for driving the dimmer mounting disc (3-4) to rotate;
the light-reducing sheet mounting disc (3-4), a plurality of light-reducing sheet holes are formed in the light-reducing sheet mounting disc (3-4) along the circumference of the mounting disc, and the light-reducing sheets (3-5) are connected in the light-reducing sheet holes;
a dimmer sheet (3-5) for changing the image brightness of the display screen (3-3);
the display screen (3-3) is connected to the motor frame (3-1) and is used for displaying the dark sighting mark;
the comprehensive processing system (4), the LED lamp panels (2-4), the motors (3-2) and the display screens (3-3) are all connected with the comprehensive processing system (4) through electric signals.
2. The apparatus for examining the dark adaptation function of rod cells as claimed in claim 1, wherein: the observation window (2-3), the dark sighting mark window and the display screen (3-3) are positioned on the same straight line.
3. The apparatus for examining the dark adaptation function of rod cells as claimed in claim 1, wherein: one side of the dark sighting mark window of the view field shell (2-1) is also connected with a camera (2-5), and the camera (2-5) faces the observation window (2-3) and is used for observing human eye images in the observation window (2-3).
4. The apparatus for examining the dark adaptation function of rod cells as claimed in claim 1, wherein: the motor frame (3-1) is also connected with a photoelectric switch (3-6), and the photoelectric switch (3-6) is directly opposite to the dimmer mounting plate (3-4) so as to detect the revolution of the dimmer mounting plate (3-4).
5. The apparatus for examining the dark adaptation function of rod cells as claimed in claim 1, wherein: the light-reducing sheets (3-5) are absorption type neutral density light-reducing sheets.
6. The apparatus for examining the dark adaptation function of rod cells as claimed in claim 1, wherein: and a narrow-band filter is attached to the display screen (3-3).
7. The apparatus for examining the dark adaptation function of rod cells as claimed in claim 1, wherein: the dimmer (3-5) is divided into two types, and the brightness of the dark sighting mark of the display screen (3-3) is respectively reduced to 10-3cd/m2And 10-4cd/m2。
8. The apparatus for examining the dark adaptation function of rod cells as claimed in claim 6, wherein: the narrow band filter allows blue and green with the wavelength of 512nm to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120781427.5U CN214965405U (en) | 2021-04-16 | 2021-04-16 | Dark adaptation function inspection device of quick rod cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120781427.5U CN214965405U (en) | 2021-04-16 | 2021-04-16 | Dark adaptation function inspection device of quick rod cell |
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| CN214965405U true CN214965405U (en) | 2021-12-03 |
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| CN202120781427.5U Active CN214965405U (en) | 2021-04-16 | 2021-04-16 | Dark adaptation function inspection device of quick rod cell |
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- 2021-04-16 CN CN202120781427.5U patent/CN214965405U/en active Active
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