CN209915943U - Optical system for binocular fatigue degree measuring device - Google Patents
Optical system for binocular fatigue degree measuring device Download PDFInfo
- Publication number
- CN209915943U CN209915943U CN201821721324.4U CN201821721324U CN209915943U CN 209915943 U CN209915943 U CN 209915943U CN 201821721324 U CN201821721324 U CN 201821721324U CN 209915943 U CN209915943 U CN 209915943U
- Authority
- CN
- China
- Prior art keywords
- light
- light source
- binocular
- optical system
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
The utility model discloses an optical system for a binocular fatigue measuring device, which comprises a double telecentric lens, an infrared camera, an infrared illumination light source, an excitation light and flash light fusion frequency integrated module, a reflector and a dichroic mirror; the surface of the stimulating light and flash light fusion frequency integrated module is provided with a stimulating surface light source, and the center of the stimulating surface light source is provided with a bright point light source. The utility model improves the measurement precision of the instrument for measuring the pupil diameter of the light reflection time by arranging two double telecentric lenses, and each lens only images a single human eye; the utility model discloses an amazing light source module and critical flash of light integration frequency module integrated design have reduced the volume of device, and amazing light source adopts the design of multiple colour area source, and the illumination degree of consistency is high, when carrying out pupil to the light reflex measurement, the human eye discomfort obviously reduces, can also carry out the many colours pupil to the light reflex measurement.
Description
Technical Field
The utility model relates to a fatigue detection technical field, in particular to an optical system for two mesh fatigue degree measuring device.
Background
With the development and progress of the society, the working and living pressure of people is more and more, and the continuous physical labor and mental labor cause people to work in a fatigue state frequently, and work in the fatigue state, so that the working efficiency is low, and importantly, the risks such as production, personal safety and the like are also accompanied.
When the human eye is subjected to light stimuli, the pupil shrinks, known as the pupillary light reflex. The contraction of the pupil is performed by the parasympathetic sphincter in the oculomotor nerve, the expansion of the pupil is performed by the sympathetically innervated mydriasis muscle, and the two are coordinated with each other at the center, thereby realizing the complex pupillary light reflex control. The time of the pupil from maximum to lowest diameter under the stimulation of the external light is called the pupil light reflex time. When a person is in a fatigue state, the pupillary light reflex time is longer than that when the person is in a mental state.
The critical flicker fusion frequency is the lowest flicker frequency when a subject considers the flicker light as continuous light, and is one of the accepted and generally adopted fatigue evaluation methods at home and abroad. In the fatigue state, the central function tends to be inhibitory, and the arousal level is reduced, and the critical flicker fusion frequency of the human body is reduced.
The existing inspection equipment and method have the defects that:
1. the measuring lens used by the existing device is a single common objective lens, and errors exist in the measurement of the pupil diameter during light reflection.
2. When pupil light reflection is carried out, the stimulation light source is a single high-brightness white light LED, discomfort obviously exists in human eyes, and the stimulation color is single.
The device integration level is not high, and the stimulation light source module and the critical flash fusion frequency module are separately designed, so that the volume of the device is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the not enough among the above-mentioned prior art, provide an optical system for two mesh fatigue degree measuring device.
In order to solve the technical problem, the utility model discloses a technical scheme is: an optical system for a binocular fatigue degree measuring device comprises a double telecentric lens, an infrared camera, an infrared illumination light source, a stimulating light and flash fusion frequency integration module, a reflector and a dichroic mirror;
the surface of the stimulating light and flash light fusion frequency integrated module is provided with a stimulating surface light source, and the center of the stimulating surface light source is provided with a bright point light source;
stimulating light and bright light emitted by the stimulating light and flash fusion frequency integrated module reach the dichroic mirror after being reflected by the reflecting mirror, and then are reflected to human eyes by the dichroic mirror; the reflected light of human eyes and the illuminating light emitted by the infrared illuminating light source transmit the dichroic mirror and then reach the infrared camera through the double telecentric lens.
Preferably, the double telecentric lens comprises two lenses for respectively imaging the left eye and the right eye, and the infrared camera comprises two lenses detachably connected to the double telecentric lens.
Preferably, one end of the double telecentric lens is provided with a connecting sleeve, and one end of the camera is provided with a connecting cannula; the connecting insertion tube is used for being inserted into the connecting sleeve in a matching mode, so that the double telecentric lens and the camera can be detachably connected.
Preferably, the end face of the connecting insertion pipe is provided with a positioning insertion column, the other end of the positioning insertion column is provided with an arc-shaped end face, the inner wall of the connecting sleeve is provided with a positioning block, and the positioning block is provided with a positioning hole for the positioning insertion column to be inserted in a matched mode.
Preferably, an arc-shaped elastic sheet is arranged on the inner wall of the positioning hole, and an arc-shaped groove used for accommodating the arc-shaped elastic sheet is formed in the outer wall of the positioning insertion column.
Preferably, the positioning hole is a rectangular hole, and the two opposite inner walls of the positioning hole are provided with the arc-shaped elastic sheets; the positioning insertion column is a rectangular column body, and the two opposite outer walls of the positioning insertion column are provided with the arc-shaped grooves.
Preferably, an installation groove is formed in the inner wall of the connecting sleeve, and a locking piece is arranged in the installation groove;
the retaining member include with the inner wall connection's of mounting groove pillar, rotatable connect in diaphragm on the pillar, connect in the briquetting of diaphragm one end, connect in the latch segment of the diaphragm other end and connect in first spring between the inner wall of latch segment and mounting groove.
Preferably, the outer wall of the connecting sleeve is provided with an opening which penetrates through the mounting groove and is used for the pressing block to extend out.
Preferably, the upper end of the pressing block is further connected with a chuck, and a second spring is connected between the chuck and the outer wall of the connecting sleeve.
Preferably, the outer wall of the connecting insertion pipe is further provided with a locking groove for the locking block to be inserted in a matched mode.
The utility model has the advantages that: the utility model improves the measurement precision of the instrument for measuring the pupil diameter of the light reflection time by arranging two double telecentric lenses, and each lens only images a single human eye; the utility model discloses an amazing light source module and critical flash of light integration frequency module integrated design have reduced the volume of device, and amazing light source adopts the design of multiple colour area source, and the illumination degree of consistency is high, when carrying out pupil to the light reflex measurement, the human eye discomfort obviously reduces, can also carry out the many colours pupil to the light reflex measurement. The utility model discloses a to the measurement of pupil light reflex time and the comprehensive measurement of critical flash of light fusion frequency, judge human fatigue state, it is high to detect the accuracy, has fine application prospect.
Drawings
Fig. 1 is a schematic structural diagram of an optical system for a binocular fatigue measurement apparatus according to the present invention;
fig. 2 is a schematic structural diagram of the stimulating light and flash light fusion frequency integrated module of the present invention;
fig. 3 is an exploded view of the dual telecentric lens and the infrared camera of the present invention;
FIG. 4 is a schematic cross-sectional structural view of the connection sleeve of the present invention;
FIG. 5 is a schematic view of a partial enlarged structure of the locking member of the present invention;
FIG. 6 is a schematic cross-sectional view of the connecting cannula of the present invention;
fig. 7 is a schematic structural view of the positioning insertion column of the present invention;
fig. 8 is a schematic structural view of the connection sleeve and the connection cannula of the present invention.
Description of reference numerals:
1-double telecentric lens; 2-an infrared camera; 3-infrared illumination light source; 4-stimulus light and flash light fusion frequency integration module; 5-a reflector; 6-dichroic mirror; 7-human eye; 8, connecting a sleeve; 9-connecting the cannula; 40-stimulating area light source; 41-bright spot light source; 80-positioning blocks; 81-positioning holes; 82-arc shaped elastic pieces; 83-mounting groove; 84-a locking member; 90-positioning the inserted column; 91-arc end face; 92-an arc-shaped groove; 93-locking groove; 840-a pillar; 841-transverse plate; 842-briquetting; 843-locking block; 844 — a first spring; 845, opening holes; 846-chuck; 847-second spring.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1 to 8, an optical system for a binocular fatigue measurement apparatus of the present embodiment includes a double telecentric lens 1, an infrared camera 2, an infrared illumination light source 3, a stimulus light and flash fusion frequency integration module 4, a reflecting mirror 5, and a dichroic mirror 6.
The surface of the stimulating light and flash light fusion frequency integrated module 4 is provided with a stimulating surface light source 40, and the center of the stimulating surface light source 40 is provided with a bright spot light source 41. The stimulus light and flash fusion frequency integration module 4 includes light sources of a plurality of colors, 4 in a preferred embodiment.
The stimulating light and the bright point light emitted by the stimulating light and flash light fusion frequency integrated module 4 reach the dichroic mirror 6 after being reflected by the reflecting mirror 5, and then are reflected to the human eyes 7 by the dichroic mirror 6; the reflected light of the human eyes 7 and the illumination light emitted by the infrared illumination light source 3 transmit the dichroic mirror 6 and then reach the infrared camera 2 through the double telecentric lens 1;
wherein, amazing light source module and critical flash of light integration frequency module integrated design have reduced the volume of device, and amazing light source adopts the design of multiple colour area light source, and the illumination degree of consistency is high, when carrying out pupil light reflex measurement, the discomfort of people's eye 7 obviously reduces, can also carry out the measurement of many colours pupil light reflex.
The double telecentric lens 1 comprises two lenses for imaging the left eye and the right eye respectively, and the infrared camera 2 comprises two lenses detachably connected to the double telecentric lens 1. Each lens only images a single human eye 7, and the measurement precision of the pupil diameter of the instrument for measuring the light reflection time is improved.
Adopt the utility model discloses an optical system to combine necessary other outside auxiliary assembly to make two mesh fatigue measuring device promptly, can carry out pupil and measure the light reflex time, in order to judge human fatigue state. The necessary external auxiliary equipment may generally include a software processing system for computational analysis of the measurement data and some conventional mechanical components.
In one embodiment, adopt and be based on the utility model discloses an optical system's two mesh fatigue degree measuring device carries out pupil to light reflex time measuring flow does: the bright spot light source 41 of the stimulation light and flash light fusion frequency integrated module 4 is firstly turned on and set to be normally bright, and an image of the bright spot light source 41 is reflected by the reflecting mirror 5 and the dichroic mirror 6, so that an observation sighting mark is provided for the human eyes 7, and the stability of the human eyes 7 during measurement is kept. And then simultaneously turning on the infrared illumination light source 3 to illuminate human eyes 7, wherein the images of the human eyes 7 reach the infrared camera 2 through the dichroic mirror 6 and the double telecentric lens 1. After the image of the human eye 7 is kept stable, the stimulating surface light source 40 of the stimulating light and flash light fusion frequency integration module 4 is turned on to complete the light stimulation on the human eye 7. Then the pupil light reflex time is calculated by a software system in the device. When the critical flash fusion frequency is measured, the stimulating surface light source 40 of the stimulating light and flash fusion frequency integration module 4 is set to be normally bright, and the critical flash fusion frequency of human eyes 7 is measured by adjusting the bright spot flashing frequency. The fatigue state of the human body is judged by measuring the light reflection time of the pupil and comprehensively measuring the critical flash fusion frequency.
One end of the double telecentric lens 1 is provided with a connecting sleeve 8, and one end of the camera is provided with a connecting cannula 9; the connecting cannula 9 is used for being inserted in the connecting sleeve 8 in a matching mode so as to realize the detachable connection of the double telecentric lens 1 and the camera. The double telecentric lens 1 and the camera can be conveniently and rapidly mounted and dismounted, and the convenience of mounting and use can be improved.
The end face of the connecting insertion pipe 9 is provided with a positioning insertion column 90, the other end of the positioning insertion column 90 is provided with an arc-shaped end face 91, the inner wall of the connecting sleeve 8 is provided with a positioning block 80, and the positioning block 80 is provided with a positioning hole 81 for matching and inserting the positioning insertion column 90. The connection sleeve 8 is further provided with an alignment mark line (not shown in the figure), and the alignment mark line, the positioning hole 81 and the positioning insertion column 90 are in the same straight line.
The inner wall of the positioning hole 81 is provided with an arc-shaped elastic sheet 82, and the outer wall of the positioning insertion column 90 is provided with an arc-shaped groove 92 for accommodating the arc-shaped elastic sheet 82. Referring to fig. 5 and 7, in a preferred embodiment, the positioning hole 81 is a rectangular hole, and two opposite inner walls of the positioning hole are provided with arc-shaped elastic sheets 82; the positioning insertion column 90 is a rectangular column, and two opposite outer walls of the positioning insertion column are provided with arc-shaped grooves 92. The positioning insertion column 90 breaks through the arc-shaped elastic pieces 82 through the arc-shaped end faces 91, after the positioning insertion column is inserted into the positioning hole 81 in a jacking mode, the arc-shaped elastic pieces 82 on the upper inner wall and the lower inner wall of the positioning hole 81 are clamped in the arc-shaped grooves 92 on the upper outer wall and the lower outer wall of the positioning insertion column 90, extrusion is generated, the positioning insertion column 90 is locked and positioned, the positioning insertion column 90 is convenient to install in place, the positioning insertion column 90 can be stably clamped in the positioning hole 81, and connection stability can be improved.
The double-telecentric lens 1 is detachably connected with the camera and locked through the locking piece 84, so that the double-telecentric lens 1 and the camera can be conveniently installed and replaced, and the use convenience is improved. Specifically, referring to fig. 7, in one embodiment, the inner wall of the connection sleeve 8 is provided with a mounting groove 83, and a locking member 84 is disposed in the mounting groove 83; the locking member 84 includes a support 840 connected to the inner wall of the mounting groove 83, a cross plate 841 rotatably connected to the support 840, a pressing block 842 connected to one end of the cross plate 841, a locking block 843 connected to the other end of the cross plate 841, and a first spring 844 connected between the locking block 843 and the inner wall of the mounting groove 83. The outer wall of the connection sleeve 8 is provided with an opening 845 which runs through to the mounting groove 83 and through which the pressing block 842 extends. The upper end of the pressing block 842 is further connected with a chuck 846, and a second spring 847 is connected between the chuck 846 and the outer wall of the connecting sleeve 8. The outer wall of the connecting insertion tube 9 is also provided with a locking groove 93 for the locking block 843 to be inserted in a matching way.
Referring to fig. 3, the connecting sleeve 8 is arranged at the right end of the double telecentric lens 1, and the camera 1 is connected at the right end of the double telecentric lens 1 through the connecting cannula 9. When the double telecentric lens 1 is connected with a camera for installation, the positioning insertion column 90 on the connecting insertion tube 9 is aligned with the alignment mark line on the connecting sleeve 8 (so as to realize the alignment of the positioning insertion column 90 and the positioning hole 81), then the pressing block 842 is pressed inwards, the pressing block 842, the chuck 846 and the transverse plate 841 at the end move downwards, the chuck 846 compresses the second spring 847, under the rotation supporting action of the support column 840, the other end of the transverse plate 841 extrudes the first spring 844 and moves upwards, so that the locking block 843 is accommodated in the installation groove 83; then the connecting cannula 9 is inserted into the connecting sleeve 8 and goes deep to the bottom, so that the positioning insertion column 90 on the connecting cannula 9 is inserted into the positioning hole 81 in a matching manner, and meanwhile, the locking groove 93 on the outer wall of the connecting cannula 9 moves to the position below the locking block 843; then, the pressing block 842 is loosened, the first spring 844 presses the locking block 843 downwards, the second spring 847 presses the chuck 846 upwards, downward pressure is generated on the locking block 843 through the transmission effect of the transverse plate 841, the locking block 843 moves downwards and is clamped into the locking groove 93 in a matching manner, locking is achieved, and the connection of the double telecentric lens 1 and the camera is completed. During disassembly, the pressing block 842 is pressed firstly, the locking block 843 is separated from the locking groove 93 to realize unlocking, and then the connecting insertion tube 9 is pulled out from the connecting sleeve 8, so that the double telecentric lens 1 can be taken down from the camera. Thereby being convenient to disassemble and beneficial to use. In a preferred embodiment, retaining member 84 comprises 2 sets arranged symmetrically. The second spring 847 can enhance the locking force of the pressing locking block 843 and is matched with the first spring 844, so that the locking is firmer; meanwhile, the second spring 847 generates upward elastic force on the chuck 846, can promote the pressing block 842 to return, and can prevent the pressing block 842 from excessively moving downwards and completely penetrating into the locking groove 93 to cause the phenomenon that the pressing block 842 cannot pop out to return in cooperation with the chuck 846.
While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields where the invention is suitable, and further modifications may readily be made by those skilled in the art, and the invention is therefore not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (10)
1. An optical system for a binocular fatigue degree measuring device is characterized by comprising a double telecentric lens, an infrared camera, an infrared illumination light source, a stimulating light and flash fusion frequency integration module, a reflector and a dichroic mirror;
the surface of the stimulating light and flash light fusion frequency integrated module is provided with a stimulating surface light source, and the center of the stimulating surface light source is provided with a bright point light source;
stimulating light and bright light emitted by the stimulating light and flash fusion frequency integrated module reach the dichroic mirror after being reflected by the reflecting mirror, and then are reflected to human eyes by the dichroic mirror; the reflected light of human eyes and the illuminating light emitted by the infrared illuminating light source transmit the dichroic mirror and then reach the infrared camera through the double telecentric lens.
2. The optical system for binocular fatigue measurement apparatus according to claim 1, wherein the double telecentric lens includes two for imaging the left and right eyes respectively, and the infrared camera includes two detachably connected to the double telecentric lens.
3. The optical system for binocular fatigue measurement devices according to claim 2, wherein one end of the double telecentric lens is provided with a connection sleeve, and one end of the camera is provided with a connection cannula; the connecting insertion tube is used for being inserted into the connecting sleeve in a matching mode, so that the double telecentric lens and the camera can be detachably connected.
4. The optical system for binocular fatigue measuring devices according to claim 3, wherein a positioning insertion column is disposed on an end face of the connection insertion tube, the other end of the positioning insertion column has an arc-shaped end face, a positioning block is disposed on an inner wall of the connection sleeve, and a positioning hole for the positioning insertion column to be inserted in a matched manner is formed in the positioning block.
5. The optical system for binocular fatigue measuring devices according to claim 4, wherein an arc-shaped elastic sheet is arranged on an inner wall of the positioning hole, and an arc-shaped groove for accommodating the arc-shaped elastic sheet is formed in an outer wall of the positioning insertion column.
6. The optical system for binocular fatigue measurement devices according to claim 5, wherein the positioning holes are rectangular holes, and the arc-shaped elastic pieces are arranged on two opposite inner walls of the positioning holes; the positioning insertion column is a rectangular column body, and the two opposite outer walls of the positioning insertion column are provided with the arc-shaped grooves.
7. The optical system for binocular fatigue measuring devices according to claim 5, wherein an installation groove is formed in an inner wall of the connection sleeve, and a locking member is disposed in the installation groove;
the retaining member include with the inner wall connection's of mounting groove pillar, rotatable connect in diaphragm on the pillar, connect in the briquetting of diaphragm one end, connect in the latch segment of the diaphragm other end and connect in first spring between the inner wall of latch segment and mounting groove.
8. The optical system for binocular fatigue measurement devices of claim 7, wherein an opening for the extension of the pressure block is formed through the outer wall of the connection sleeve to the mounting groove.
9. The optical system for binocular fatigue measurement according to claim 8, wherein a chuck is further coupled to an upper end of the pressing block, and a second spring is coupled between the chuck and an outer wall of the coupling sleeve.
10. The optical system for binocular fatigue measurement unit of claim 9, wherein the outer wall of the connection insertion tube is further provided with a locking groove for the locking block to be inserted in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821721324.4U CN209915943U (en) | 2018-10-23 | 2018-10-23 | Optical system for binocular fatigue degree measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821721324.4U CN209915943U (en) | 2018-10-23 | 2018-10-23 | Optical system for binocular fatigue degree measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209915943U true CN209915943U (en) | 2020-01-10 |
Family
ID=69064223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821721324.4U Active CN209915943U (en) | 2018-10-23 | 2018-10-23 | Optical system for binocular fatigue degree measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209915943U (en) |
-
2018
- 2018-10-23 CN CN201821721324.4U patent/CN209915943U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204839441U (en) | Synthesize device that maincenter fatigue test is carried out in critical flicker fusion frequency and eye movement reaction | |
| CN201529105U (en) | Electronic image inspection instrument used for comprehensive inspection of ear, nose and throat | |
| CN101513342A (en) | Full-view pupil analysis measurement method | |
| CN104739364A (en) | Binocular pupil light reflex tracking system | |
| CN209915943U (en) | Optical system for binocular fatigue degree measuring device | |
| CN201578222U (en) | Visual chart lamp box with adjustable illumination | |
| CN106725282A (en) | A kind of small-sized dry eyes testing equipment | |
| CN109350005B (en) | Optical system for binocular fatigue measuring device | |
| CN204813795U (en) | Device based on it is tired that eye movement pan speed detects maincenter | |
| CN213097775U (en) | Tongue depressor capable of taking pictures | |
| CN201920706U (en) | Home monitoring system for neonatal jaundice | |
| CN201624678U (en) | Percussion hammer | |
| CN213551688U (en) | Pupil light reflex automated inspection eye-shade | |
| CN212281337U (en) | Multifunctional handheld dermatoscope | |
| CN210077636U (en) | Portable tongue endoscope and tongue diagnosis system | |
| CN214965308U (en) | Auxiliary device for otolaryngological examination | |
| CN213189454U (en) | Medical endoscope adopting RT-001 hysteroscope lens | |
| CN218391056U (en) | Medical metal detection device | |
| CN201375508Y (en) | Total view field analyzing and measuring device | |
| CN218391062U (en) | Visual fatigue detection device | |
| CN100451631C (en) | PCB drill bit image detecting and illuminating device | |
| CN211433003U (en) | Take photometer and eye to adjust ophthalmic lighting system of sign | |
| CN218684320U (en) | Traditional Chinese medicine tongue and surface image acquisition and identification diagnosis device | |
| CN216439546U (en) | Emergency clinical examination device | |
| CN214426948U (en) | Device for detecting endoscope |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |