CN107361736A - The function visual test method of adjustable sighting target surface illuminance - Google Patents
The function visual test method of adjustable sighting target surface illuminance Download PDFInfo
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- CN107361736A CN107361736A CN201710556114.8A CN201710556114A CN107361736A CN 107361736 A CN107361736 A CN 107361736A CN 201710556114 A CN201710556114 A CN 201710556114A CN 107361736 A CN107361736 A CN 107361736A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
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Abstract
The present invention relates to a kind of function visual test method of adjustable sighting target surface illuminance, including：1) the corresponding light modulation lens assembly of the thang-kng bore dia for projecting facility with projector to complete is fixedly connected on to the light hole of projector's projection facility light-emitting device；2) Light-modulating mirror head device is debugged, until thang-kng amount control device all arc shaped blades can normal folding, into test；3) slidable adjustment control stick causes thang-kng amount control device to be in complete open state, and visual acuity under normal luminance is carried out to subject and tests and records sighting target center brightness value；4) slidable adjustment control stick causes thang-kng amount control device to reduce thang-kng region, needed to select sighting target grade according to test, test subject is it can be found that the minimal illumination of a certain grade sighting target and can recognize the minimal illumination of a certain grade sighting target, the record central brightness value of sighting target this moment；5) suggestion of minimum ambient light illumination in subject's daily life is given according to the test result of record.
Description
Technical field
The present invention is on a kind of function visual test method of adjustable sighting target surface illuminance, is related to eyesight detection technique
Field.
Background technology
A variety of eye diseases such as age-related cataract can cause human eye to be shown more when ambient light illumination declines
Significant visual acuity declines, and then significantly affects visual correlation viability of the patient under half-light environment, makes it in illumination bar
The words identification information be beyond recognition when part is bad in environment can not find barrier rapidly, cause inconvenience or even dangerous hair
It is raw.Actual environment in daily life is extremely complex, and visual sensitivity of the individual under the conditions of less than normal luminance is to weighing it
Real life ability is often more meaningful.Therefore, it is necessary to while visual acuity under the conditions of evaluating subject's normal luminance, it is right
Its visual acuity under the conditions of less than normal luminance is assessed, and the minimum environment in being lived according to assessment result to subject shines
Bright condition provides certain suggestion, inconvenience caused by visual acuity declines during so as to avoid illumination condition bad and dangerous.
(more than sighting target surface illuminance 500lux) is quick with regarding for visual chart sighting target test subject under the conditions of normal luminance
Degree is the visual acuity method of testing more generally used at present.The method of testing can not be commented the visual acuity under half-light environment
Valency.In visual acuity test device field, still lacking can continuously adjust according to the requirement of test purpose to sighting target surface illuminance
So as to realize the device of visual acuity test under different illumination conditions.It is more by existing in visual function test and appraisal experimental field, researcher
There is device power-up repacking to realize the purpose tested less than visual acuity under the conditions of normal luminance to adjust the method for transmitting light source.It is above-mentioned
Method it is relatively complicated and it is relatively difficult to achieve sighting target illumination is continuously adjusted, limit visual acuity measuring technology under different illumination conditions
Application and popularization.Therefore, it is necessary to design it is a kind of by can with the portable unit of existing projection visual chart hardware compatibility and
Associated method of use realizes the method that visual acuity measures under different illumination conditions, and existing projector is expanded by this method
Function, make visual acuity measurement under different illumination conditions convenient feasible.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide one kind can realize the test of different lighting levels' visual acuitys and
The function visual test method that the surface illuminance for projecting sighting target can be continuously adjusted.
To achieve the above object, the present invention takes following technical scheme：A kind of function of adjustable sighting target surface illuminance regards
Feel method of testing, it is characterised in that comprise the following steps：1) before testing, the logical of projector's projection facility to be connected is measured
Unthreaded hole diameter, and the corresponding light modulation camera lens of the thang-kng bore dia for projecting facility with the projector to complete is filled
Put and be fixedly connected on the light hole of projector's projection facility light-emitting device, wherein, the light modulation lens assembly bag
Include thang-kng amount control device and regulation control stick；2) the light modulation lens assembly is debugged, until the logical fader control
All arc shaped blades of device can normal folding, into test；3) slide the regulation control stick and cause the thang-kng amount
Control device is in complete open state, and visual acuity under normal luminance is carried out to subject and tests and records test result；4) it is sliding
The dynamic regulation control stick causes the thang-kng amount control device to reduce thang-kng region, is needed to select sighting target grade according to test,
Test subject is it can be found that the minimal illumination of a certain grade sighting target and can recognize the minimal illumination of a certain grade sighting target, record
Test result；5) suggestion of minimum ambient light illumination in subject's daily life is given according to the test result of record.
Further, the light modulation lens assembly also includes inlaying device and lid；The inlaying device center offers
Consistent reach through hole, offered corresponding to described at the top of the position of through hole, the inlaying device for being embedded the thang-kng amount
The annular groove of control device, corresponding to the position of the annular groove, the side of the inlaying device is offered for supplying the tune
The slideway opening that control stick carries out arcuate movement is saved, the lid, the lid top are fixedly connected with the top of the inlaying device
Portion offers light hole, corresponding to the position of the light hole, the lid center extend outward be provided with one be used for and institute
State projector's projection lens and be attached fixed loop configuration.
Further, the step 4) needs to select sighting target grade according to test, and subject is it can be found that certain is first-class for test
The minimal illumination of level sighting target simultaneously can recognize the minimal illumination of a certain grade sighting target, record the brightness value in sighting target center this moment, tool
Body process is：The sighting target of embarking on journey for the minimum one-level that can be recognized using subject in projector, slide the regulation and manipulate
Bar makes the arc shaped blade of the thang-kng amount control device gradually gather to center, reduces thang-kng region to almost closing, reversely slides
The regulation control stick is moved, gradually increases thang-kng region；It is required that subject examines the sighting target of projection, when discovery has sighting target to go out
Current to notify examiner immediately, examiner stops the operation of the regulation control stick, records the illumination in now sighting target pattern center
Value, this brightness value are the brightness value that subject has just had found the grade sighting target；Whether inquiry subject can recognize the side of sighting target
To record subject had both can be found that the sighting target of the grade can also correctly recognize the illumination of sighting target if it can correctly recognize
Value；If subject can not recognize sighting target direction, continue to stir the regulation control stick increase thang-kng region, until subject
Sighting target can be correctly recognized, stops sliding the regulation control stick and records the brightness value in sighting target center this moment.
Further, the step 2) is to the detailed process debugged of light modulation lens assembly：By sliding
State regulation control stick observe the thang-kng amount control device arc shaped blade whether can normal folding, if the thang-kng amount control
The arc shaped blade of device processed can normal folding, then enter test, if the arc shaped blade of the thang-kng amount control device can not
Normal folding, the light modulation lens assembly is checked, until all arc shaped blades of the thang-kng amount control device can be normal
Folding.
Further, the test result includes other subject's eye, refractive status, most preferably corrects defects of vision, finds optimal rectify
The minimal illumination of positive eyesight sighting target, the minimal illumination and suggestion environment minimal illumination of the optimal sighting target of correcting defects of vision of identification.
Further, the thang-kng amount control device includes arc shaped blade, blade fixed disk and runner block, and the blade is consolidated
Price fixing is fixedly installed in the annular groove, and the runner block is fixedly installed in the lid.
Further, the arc shaped blade is using some sizes, the thin metal arc shaped blade of structure identical, the arc-shaped leaf
Piece entirety folding forms the thang-kng region close to circle, and one end of each arc shaped blade, which upwardly extends, sets a top to consolidate
Fixed column, the other end of each arc shaped blade extend downward with a bottom fixed column.
Further, the blade fixed disk uses annular sheet metal, equally circumferentially spaced on the blade fixed disk
There is the positioning hole for wearing the bottom fixed column, all arc shaped blade arrangements make the arc shaped blade entirely cover in imbricate
The ring discoid region of the blade fixed disk is covered, the outer end of the blade fixed disk, which further extends outward, to be provided with and the tune
The connection handle that section control stick is fixedly connected.
Further, the runner block uses annular disk, and the runner block bottom has been provided at circumferentially spaced for described in confession
The top fixed column of arc shaped blade carries out the radial groove of radial motion, and the action bars that adjusts is along the slideway harness motion
Control the arc shaped blade to be moved in the radial groove, and then change the aperture in thang-kng region.
Further, the light modulation lens assembly is fixedly connected on into the projection by the loop configuration before test to regard
Power table projects the light hole of facility light-emitting device, the loop configuration and the accessible length of projector's projection lens
For 4mm.
For the present invention due to taking above technical scheme, it has advantages below：1st, function visual test method of the invention
Sighting target grade (such as Snellen visual charts that adjustment sighting target grade is low visual acuity grade scale can be needed to adjust according to test
0.3 grade), it is horizontal so as to test to obtain the minimal illumination that subject reaches needed for a certain eyesight rank, according to assessment result pair
Minimum ambient lighting conditions in subject's life provide certain suggestion, and visual acuity declines and caused when avoiding illumination condition bad
It is inconvenient and dangerous.2nd, different illumination are obtained regarding calibration method difference from adjusting light source illumination level, the present invention is with external camera lens
Device realizes that sighting target surface illuminance is projected to projector to be continuously adjusted, with existing projector's equipment compatibility
By force, avoid to realize visual acuity test under different illumination conditions and the inconvenience of extensive start repacking carried out to existing equipment,
The present invention is by external to the light modulation lens assembly before existing projector's projection lens, realizing to projected sighting target surface
Illumination continuously adjusts, and so as to easily realize the test less than visual acuity under the conditions of normal luminance, has expanded existing set
Standby use range.3rd, the iris that the present invention is formed with multiple overlapped arc shaped blades form the thang-kng of external camera lens
Hole, thang-kng bore dia and thang-kng amount are adjusted by way of changing diaphragm diameter, limit, realize without gear during regulation
The surface illuminance for projecting sighting target is carried out in the range of original projector's equipment standard illumination (being usually 500lux) continuous
Regulation, so as to realize the Linear Control to testing sighting target illumination, wanting for visual function test can be met in the larger context
Ask.4th, the iris type aperture being made up of multiple overlapped thin metal arc shaped blades is embedded in inlaying device by the present invention, shape
Into external light modulation camera lens, easily realize that visual acuity detects under different level conditions, test device provided by the present invention into
This is low, easy to make, and method of testing provided by the present invention is simple and easy to do, more conducively the promotion and popularization of visual function test.
In summary, the test that the present invention can be widely applied to less than the visual acuity under the conditions of normal luminance is assessed.
Brief description of the drawings
Fig. 1 is the lens assembly structural representation of the present invention；
Fig. 2 is the inlaying device structural representation of the present invention；
Fig. 3 is the cover body structure schematic diagram of the present invention；
Fig. 4 (a) and (b) are the structural representation for the arc shaped blade for being the present invention；
Fig. 5 is the blade fixed disk structural representation of the present invention；
Fig. 6 is the runner block structural representation of the present invention.
Embodiment
Come to carry out the present invention detailed description below in conjunction with accompanying drawing.It should be appreciated, however, that accompanying drawing has been provided only more
Understand the present invention well, they should not be interpreted as limitation of the present invention.
As shown in figure 1, the function visual test method of sighting target surface illuminance is can adjust provided by the present invention for realizing
Projector's light modulation lens assembly of adjustable sighting target surface illuminance, including inlaying device 1, thang-kng amount control device, regulation
Control stick 2 and lid 3.
As shown in Fig. 2 inlaying device 1 uses oblate rod structure, the center of inlaying device 1 offers consistent reach through hole 11, right
Ying Yu runs through the position of through hole 11, and the top of inlaying device 1 offers the annular groove 12 for being embedded thang-kng amount control device, corresponding
In the position of the annular groove 12, the side of inlaying device 1 offers opens for carrying out the slideway of arcuate movement for regulation control stick 2
Mouth 13, slideway opening 13 are used to cause regulation control stick 2 to connect thang-kng amount control device and control thang-kng amount control device to be adjusted
Section, the top of inlaying device 1 is fixedly connected with lid 3.
As shown in figure 3, lid 3 uses hollow oblate rod structure, the top of lid 3 offers a light hole 31, corresponded to
The position of light hole 31, the center of lid 3, which extends outward, is provided with a ring to match with projector's projection lens size
Shape structure 32.
In a preferred embodiment, as shown in Fig. 4~Fig. 6, thang-kng amount control device uses the design of iris
Principle, regulation control stick 2 are moved by controlling the arc shaped blade clutch of iris to change iris along slideway opening 13
The aperture of central area circle light hole, and then the thang-kng amount of projector luminaire is controlled to reduce projected light
Line.The thang-kng amount control device of the present embodiment includes arc shaped blade 4, blade fixed disk 5 and runner block 6, and blade fixed disk 5 is fixed
It is arranged in annular groove 12, runner block 6 is fixedly installed in lid 3.
The arc shaped blade of the present embodiment is some sizes, the thin metal arc shaped blade 4 of structure identical, and its radian is according to device
Depending on selected arc shaped blade number, the present embodiment uses 14 arc shaped blades 4 so that the folding of arc shaped blade 4 formation connects as far as possible
The thang-kng region of subcircular, the radian of the arc shaped blade 4 of the present embodiment is 135 °, as example, not limited to this.As shown in figure 4,
One end of each arc shaped blade 4, which upwardly extends, sets a top fixed column 41, and the other end of each arc shaped blade 4 is to downward
Stretch and be provided with a bottom fixed column 42.As shown in figure 5, the blade fixed disk 5 of the present embodiment is annular sheet metal, blade fixed disk
The positioning hole 51 positioned for wearing bottom fixed column 42 to arc shaped blade 4, positioning hole 51 are circumferentially provided with 5 at equal intervals
Quantity it is identical with the quantity of arc shaped blade 4, the arrangement of all arc shaped blades 4 makes arc shaped blade 4 entirely cover blade to consolidate in imbricate
The ring discoid region of price fixing 5.The outer end of blade fixed disk 5 further extends outward to be provided with and is fixedly connected with regulation control stick 2
Connection handle 52, as shown in fig. 6, runner block 6 can use annular disk, the bottom of runner block 6 has been provided at circumferentially spaced for supplying arc
The top fixed column 41 of shape blade 4 carries out the radial groove 61 of radial motion.Regulation action bars 3 moves control along slideway opening 13
Arc shaped blade 4 processed moves in radial groove 61, and then changes the aperture in iris center thang-kng region.
In a preferred embodiment, the length of the loop configuration 32 of the present embodiment is about 4mm, and loop configuration 32 is used for
Fixation is attached with projector projection lens.
The present invention provides a kind of function visual test method of adjustable sighting target surface illuminance, including herein below：
1st, measurement test projects the thang-kng bore dia of facility with projector, and making can be thrown with testing with projector
The light modulation camera lens inlaying device that shadow camera lens is connected, it is specially：
First, the internal diameter size of inlaying device 1 is measured, regulation action bars 2 and lid are made according to the size of inlaying device 1
3, and accordingly make arc shaped blade 4, blade fixed disk 5 and the runner block 6 of thang-kng amount control device；Then, by inlaying device 1,
Thang-kng amount control device, regulation control stick 2 and the installation of lid 3；Finally the loop configuration 32 for dimming lens assembly is fixed
It is connected on the light hole of projector's projection facility light-emitting device.
2nd, dimmed by sliding camera lens regulation control stick 2 observe arc shaped blade 4 whether can normally folding so as to adjusting
Thang-kng regional diameter, if arc shaped blade 4 can normal folding, enter test, if arc shaped blade 4 can not normal folding,
Check light modulation lens assembly, until arc shaped blade 4 can normal folding, into test.
3rd, the regulation control stick 2 for sliding light modulation camera lens causes arc shaped blade 4 to be in complete open state, camera lens thang-kng region
The diameter state for not limiting thang-kng consistent with visual chart projection facility thang-kng bore dia, carries out regarding under normal luminance to subject
Sensitivity is tested, and suggests that right and left eyes and eyes are tested respectively during test, records test result, and measure projection formation with illumination photometer and regard
Target pattern centre illumination, records the brightness value.
4th, slidable adjustment control stick 2 causes thang-kng amount control device to reduce thang-kng region, is needed to select sighting target according to test
Grade, test subject is it can be found that the minimal illumination of a certain grade sighting target and can recognize the minimum photograph of a certain grade sighting target
Degree, records test result, and detailed process is：
The minimum one-level that can be recognized using those who are investigated in projector remote control projection Snellen visual charts into
Row sighting target, sliding the regulation control stick of light modulation camera lens makes arc shaped blade 4 gradually gather to center, reduces the transparent zone of light modulation camera lens
To almost closing, reverse slide dims the regulation control stick 2 of camera lens in domain, gradually the thang-kng region of increase light modulation camera lens.
It is required that subject examines the sighting target of projection, examiner, examiner are notified immediately when finding and having sighting target to occur
Stop regulation control stick 2 operation, illumination photometer record now sighting target pattern center brightness value, this brightness value be subject just
It can be found that the brightness value of the grade sighting target.
Whether inquiry subject can recognize the direction of sighting target, and subject is recorded if it can correctly recognize can both send out
Now the sighting target of the grade can also correctly recognize the brightness value of sighting target；If subject can not recognize sighting target direction, it is necessary to after
Continuous regulation control stick 2 of stirring increases thang-kng region, until subject can correctly recognize sighting target, stops slidable adjustment control stick 2
And the brightness value in sighting target center this moment is recorded with illumination photometer；Above-mentioned brightness value is that subject can reach its optimal visual acuity most
Low-light (level) value, it is proposed that subject's surroundings illumination, so as to keep best vision, avoids illumination condition not less than the brightness value
Inconvenience caused by visual acuity declines when good and danger.
Such as：When subject is equal to 0.5 in visual acuity under the conditions of normal luminance (Snellen visual charts), eyesight is projected
The sighting target of embarking on journey of 0.5 grade in table remote control projection Snellen visual charts, sliding the regulation control stick 2 of light modulation camera lens makes arc
Blade 4 is gradually gathered to center, reduces the thang-kng region of light modulation lens assembly to almost closing, reverse slide dims the tune of camera lens
Control stick 2 is saved, gradually increases thang-kng region, it is desirable to which subject examines the sighting target of projection, is stood when finding and having sighting target to occur
Examiner is notified, examiner stops the operation of regulation control stick, and illumination photometer records the brightness value in now sighting target pattern center, this
Brightness value is the brightness value that subject just can be found that the 0.5 grade sighting target.Whether inquiry subject can recognize sighting target
Direction, record subject had not only can be found that the sighting target of the grade but also can correctly recognize the photograph of sighting target if it can correctly recognize
Angle value；If subject can not recognize sighting target direction, slidable adjustment control stick 2 need to be continued to open big thang-kng region, until suffering from
Person can correctly recognize sighting target, stop the brightness value that regulation control stick 2 is operated and sighting target center this moment is recorded with illumination photometer, the photograph
Angle value is the minimal illumination value that subject can reach the grade visual acuity of Snellen visual charts 0.5；It is recommended that subject's surroundings
Illumination is not less than the brightness value so that the minimal visual acuity standard for meeting daily life Activities can be remained able to.
In a preferred embodiment, test result can include subject's eye not (left eye, right eye and eyes), dioptric
State, the minimal illumination (lux) most preferably corrected defects of vision (BCVA), find BCVA sighting targets, the minimal illumination for identifying BCVA sighting targets
(lux) and suggest environment minimal illumination.
In summary, can be according to survey using the function visual test method of adjustable sighting target surface illuminance of the invention
Purpose adjustment sighting target grade (such as grade of Snellen visual charts 0.3 that adjustment sighting target grade is low visual acuity grade scale) is tried, from
And test and obtain subject to reach minimal illumination needed for a certain eyesight rank horizontal, in being lived according to assessment result to subject
Minimum ambient lighting conditions provide certain suggestion.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all
It can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement, should not exclude
Outside protection scope of the present invention.
Claims (10)
- A kind of 1. function visual test method of adjustable sighting target surface illuminance, it is characterised in that comprise the following steps：1) before testing, measure the thang-kng bore dia of projector's projection facility to be connected, and will complete with it is described The light modulation lens assembly that the thang-kng bore dia of projector's projection facility is corresponding is fixedly connected on projector's throwing On the light hole of shadow facility light-emitting device, wherein, the light modulation lens assembly includes thang-kng amount control device and regulation control stick；2) the light modulation lens assembly is debugged, until all arc shaped blades of the thang-kng amount control device can be just Normally opened conjunction, into test；3) sliding the regulation control stick causes the thang-kng amount control device to be in complete open state, enters rower to subject Visual acuity is tested and records test result under quasi- illumination；4) sliding the regulation control stick causes the thang-kng amount control device to reduce thang-kng region, needs selection to regard according to test Grade is marked, test subject is it can be found that the minimal illumination of a certain grade sighting target and can recognize the minimum photograph of a certain grade sighting target Degree, record test result；5) suggestion of minimum ambient light illumination in subject's daily life is given according to the test result of record.
- 2. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 1, it is characterised in that the tune Light lens assembly also includes inlaying device and lid；The inlaying device center offers consistent reach through hole, is passed through corresponding to described The position of reach through hole, the inlaying device top offer the annular groove for being embedded the thang-kng amount control device, corresponded to The position of the annular groove, the side of the inlaying device offer the cunning for carrying out arcuate movement for the regulation control stick Road opening, the lid is fixedly connected with the top of the inlaying device, light hole is offered at the top of the lid, corresponding to described The position of light hole, the lid center, which extends outward, is provided with one for being connected with projector's projection lens Connect fixed loop configuration.
- 3. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 1 or 2, it is characterised in that institute State step 4) needs to select sighting target grade according to test, and test subject is it can be found that the minimal illumination and energy of a certain grade sighting target The minimal illumination of a certain grade sighting target is enough recognized, the central brightness value of sighting target, detailed process are record this moment：The sighting target of embarking on journey for the minimum one-level that can be recognized using subject in projector, sliding the regulation control stick makes institute The arc shaped blade for stating thang-kng amount control device is gradually gathered to center, thang-kng region is reduced to almost closing, described in reverse slide Control stick is adjusted, gradually increases thang-kng region；It is required that subject examines the sighting target of projection, examiner is notified immediately when finding and having sighting target to occur, examiner stops The operation of the regulation control stick, now the central brightness value of sighting target pattern, this brightness value are that subject just has found this to record The brightness value of grade sighting target；Whether inquiry subject can recognize the direction of sighting target, and subject is recorded if it can correctly recognize and both can be found that this The sighting target of grade can also correctly recognize the brightness value of sighting target；If subject can not recognize sighting target direction, continue to stir institute Regulation control stick increase thang-kng region is stated, until subject can correctly recognize sighting target, stops sliding the regulation control stick simultaneously Record the brightness value in sighting target center this moment.
- 4. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 1, it is characterised in that the step It is rapid 2) to be to the detailed process debugged of light modulation lens assembly：By slide the regulation control stick observe the thang-kng amount control device arc shaped blade whether can normal folding, such as The arc shaped blade of thang-kng amount control device described in fruit can normal folding, then enter test, if the thang-kng amount control device Arc shaped blade can not normal folding, check the light modulation lens assembly, until the thang-kng amount control device all arcs Blade can normal folding.
- 5. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 1, it is characterised in that the survey Test result includes other subject's eye, refractive status, the minimal illumination most preferably corrected defects of vision, find optimal sighting target of correcting defects of vision, knowledge Do not correct defects of vision most preferably sighting target minimal illumination and suggest environment minimal illumination.
- 6. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 2, it is characterised in that described logical Light amount control device includes arc shaped blade, blade fixed disk and runner block, and the blade fixed disk is fixedly installed on the annular In groove, the runner block is fixedly installed in the lid.
- 7. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 6, it is characterised in that the arc Using some sizes, the thin metal arc shaped blade of structure identical, the arc shaped blade entirety folding is formed close to circle shape blade Thang-kng region, one end of each arc shaped blade, which upwardly extends, sets a top fixed column, each arc shaped blade The other end extend downward with a bottom fixed column.
- 8. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 7, it is characterised in that the leaf Piece fixed disk uses annular sheet metal, is circumferentially provided with equal intervals on the blade fixed disk for wearing the bottom fixed column Positioning hole, the arrangement of all arc shaped blades makes the arc shaped blade entirely cover the annular disk of the blade fixed disk in imbricate Shape region, the outer end of the blade fixed disk further extend outward the connection for being provided with and being fixedly connected with the regulation control stick Handle.
- 9. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 8, it is characterised in that the cunning Geosynclinal block uses annular disk, and the runner block bottom is provided at circumferentially spaced to be carried out for the top fixed column for the arc shaped blade The radial groove of radial motion, the regulation action bars control the arc shaped blade in the footpath along the slideway harness motion To concave slot sports, and then change the aperture in thang-kng region.
- 10. the function visual test method of adjustable sighting target surface illuminance as claimed in claim 2, it is characterised in that test It is preceding that the light modulation lens assembly is fixedly connected on by projector's projection facility light-emitting device by the loop configuration Light hole, the accessible length of the loop configuration and projector's projection lens is 4mm.
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| CN109116506A (en) * | 2018-09-13 | 2019-01-01 | 襄阳市雄狮光电科技有限公司 | A kind of projection lens |
| CN109433737A (en) * | 2018-10-25 | 2019-03-08 | 青岛海镭激光科技有限公司 | A kind of laser cleaning output end adjustment width device |
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