CN101561347B - Binocular visual axis deviation detection device and method of video spectacles - Google Patents

Abstract

The invention provides a binocular visual axis deviation detection device and method of video spectacles. The method comprises the steps of imaging the recognition pattern generated by video spectacles using a camera device and calculating to obtain the included angle between the binocular visual axes of the video spectacles by detecting the position of the recognition pattern. The device is characterized in that a light emitting cross is put at a position with a certain distance away from the camera, the centre of the light emitting cross is located between two objective optical axes of the camera, the reference points of two image sensors of the camera are calibrated by a correction program, the position of the recognition pattern generated by the video spectacles on the image sensor is obtained by the camera, and the deviation of the binocular visual axes of the video spectacles is calculated by the deviation of the position with respect to the reference points. The invention has the advantages of quick detection speed, high precision and dynamic display capability, and provides great convenience for assembly, correction and inspection of video spectacles.

Description

Video eyeglasses binocular visual axis deviation detection device and method

Technical field

The present invention relates to display, particularly a kind of pick-up unit of video eyeglasses binocular visual axis deviation and method.

Background technology

Video eyeglasses is wear virtual monitor a kind of, claim glasses type displayer, carry-on movie theatre etc. again, because glasses type displayer outer appearance glasses, aim at the video image of large screen display audio/video player simultaneously, so image be called video eyeglasses (video glasses).Video eyeglasses displaying principle:, and then be presented in beholder's large-screen image at the moment by the image on optical system (mainly being the precision optics lens) the amplification ultra micro display screen.

Video eyeglasses is military demand at first and is applied to military.At first, just display is made helmet shape for being convenient for carrying and watching of display.Afterwards along with development has added lens to show virtual big image and to develop to the lightweight wear-type.Along with the differentiation and the specialization of video eyeglasses, towards showing and integrative development of military affairs to high-resolution, towards civilian goods to lighting with specially to the different industries development of demand.

The video eyeglasses binocular visual axis deviation is the important optical parametric that personnel's eyes comfort level is worn in influence, and inappropriate binocular visual axis deviation can cause the tired and damage of eyes, and therefore the detection to this optical parametric just becomes very important work.

Also be not exclusively used at present the detection system of video eyeglasses binocular visual axis deviation, image the calibration and the check of video eyeglasses.

Summary of the invention

The object of the present invention is to provide a kind of pick-up unit and method of video eyeglasses binocular visual axis deviation, this device has advantages such as detection speed is fast, precision is high, can dynamically show, for the dress school and the check of video eyeglasses provides great facility.

Technical solution of the present invention is as follows:

A kind of video eyeglasses binocular visual axis deviation detection device is characterized in that this device is made up of main frame, calibration system, control system:

Described main frame is by structure identical first object lens and second object lens, first imageing sensor that structure is identical and second imageing sensor, the first sensor support that structure is identical and second sensor stand, form with base, its position relation is: described first object lens and and second object lens be fixed on the described base, first imageing sensor is installed on the described first sensor support, second imageing sensor is installed on described second sensor stand, again the described first sensor support and second sensor stand are fixed on the described base, and described first object lens, the optical axis of second object lens is parallel to each other, the light-sensitive surface of described first imageing sensor and second imageing sensor respectively with the picture planes overlapping of described first object lens and second object lens;

Described calibration system is made up of luminous cross, adjustment rack, reflective cross:

Described luminous cross is by first four-bladed vane, frosted glass, light source, laser instrument, shell and power supply are formed, described first four-bladed vane, frosted glass, light source and laser instrument are installed in the described shell, and integral installation is on adjustment rack, described power supply is to described light source and laser instrument power supply, there are a spider and this spider that a center pit is arranged on described first four-bladed vane, also all there is a center pit at the center of described frosted glass and light source, the center pit of described first four-bladed vane, the center pit of frosted glass and the center pit of light source are coaxial, the light that described light source sends evenly throws light on to first four-bladed vane after frosted glass is dispersed, and the laser beam that described laser instrument sends is through described light source, outgoing after the center pit of the frosted glass and first four-bladed vane;

In the described adjustment rack, an x is installed on the base to translation stage and two dimension angular adjustment rack to translation stage and a y, described luminous cross be installed in described x to translation stage and y on translation stage and two dimension angular adjustment rack, described x is used to adjust the x of described luminous cross to translation stage to translation stage and y, position on the y both direction, described two dimension angular adjustment rack is regulated the luffing angle of described luminous cross, make described first four-bladed vane be positioned at described first object lens and the public object plane of second object lens, the mid point of the line between the optical axis of the center pit of described first four-bladed vane and described first object lens and second object lens and the intersection point of object plane overlaps;

Described reflective cross is pasted together mutually by second four-bladed vane and plane mirror and constitutes, the spider that a printing opacity is arranged on described second four-bladed vane, the reflecting surface of described plane mirror leans on mutually with described second four-bladed vane, described reflective cross is installed on the described main frame, the reflecting surface of described plane mirror is vertical with the optical axis of second object lens with described first object lens, and the central point of the spider on described second four-bladed vane is positioned on the mid point of line of intersection point of optical axis of described plane, plane mirror reflecting surface place and described first object lens and second object lens;

Described control system links to each other with second imageing sensor with described first imageing sensor, and control and images acquired process and display view data.

Described video eyeglasses binocular visual axis deviation detection device also has a guide rail, and described main frame and calibration system are installed on this guide rail.

Described first object lens and second object lens are lens, or the lens combination of being made up of the polylith lens constitutes.

Described first object lens, second object lens, first sensor support and second sensor stand are installed on the described base by an object lens adjustment rack.

Described first imageing sensor and second imageing sensor are charge-coupled image sensors, or the CMOS (Complementary Metal Oxide Semiconductor) device.

Described control system is the controller that personal computer, industrial computer or other chips and circuit board are formed.

Utilize above-mentioned video eyeglasses binocular visual axis deviation detection device to detect the method for video eyeglasses binocular visual axis deviation, it is characterized in that comprising the following steps:

1), main frame and calibration system are placed on the guide rail;

2), open laser instrument, regulate described two dimension angular adjustment rack, make laser radiation that laser instrument sends center at second four-bladed vane of described reflective cross, the spider that observation is reflected by described reflective cross drops on the position on described first four-bladed vane, by regulating x translation stage and y translation stage, the center that makes luminous cross overlaps with the center of the spider that described reflective cross reflects, and closes laser instrument;

3), open light source and illuminate first four-bladed vane;

4), regulate the first sensor support and second sensor stand, make spider on first imageing sensor and second imageing sensor as clear;

5), obtain the center position of the spider picture on first imageing sensor and second imageing sensor, respectively as the reference point O of first imageing sensor and second imageing sensor by control system ₁With reference point O ₂

6), video eyeglasses to be measured is installed on the base of main frame, the binocular emergent pupil line of centres that makes video eyeglasses and described first object lens and the second object lens entrance pupil line of centres conllinear and mid point overlap, and the binocular emergent pupil face of video eyeglasses is vertical with the optical axis of second object lens with first object lens;

7), the control device by video eyeglasses to be measured itself respectively produces a spider at the center of the left and right sides of video eyeglasses to be measured glasses display screen, by then producing cross virtual image P at object plane after the optical system of video eyeglasses to be measured ₁And P ₂, behind first object lens and second object lens, produce cross respectively as P at first imageing sensor and second imageing sensor ₁' and cross as P ₂', thereby obtain cross as P ₁' and cross as P ₂' central point and reference point O ₁With reference point O ₂Between apart from d ₁, d ₂

8) by control system with d ₁, d ₂The following formula of substitution calculates:

The range deviation D of the binocular optical axis of video eyeglasses on object plane ₁And D ₂:

$D=d\×\frac{L}{L^{\′}}=d\×L\×(\frac{1}{f^{\′}}-\frac{1}{L})$

Because video eyeglasses emergent pupil distance and D are with respect to l in a small amount, so the binocular vision shaft angle degree deviation θ of video eyeglasses ₁And θ ₂For:

$\mathrm{\θ}=\frac{D}{l}$

In the formula: L is the object distance of first object lens and second object lens, L ' is first object lens and the second object lens image distance, f ' is the focal length of first object lens and second object lens, l is the distance of object plane to first object lens and the second object lens entrance pupil, wherein L ', f ', l are known parameters, and video eyeglasses emergent pupil distance and D are with respect to l in a small amount;

9), D ₁, D ₂, θ ₁, θ ₂Result of calculation be presented on the display screen, finish detection.

Video eyeglasses binocular visual axis deviation detection device of the present invention and have and can detect advantages such as the video eyeglasses scope is wide, detection speed is fast, precision is high, can dynamically show is for the dress school and the check of video eyeglasses provides great facility.

Calibrating principle:

With reference to shown in Figure 1, Fig. 1 is a video eyeglasses binocular visual axis deviation calibration steps schematic diagram of the present invention, the main optics of video eyeglasses binocular visual axis deviation detection method of the present invention is two the first object lens 101A and the second object lens 101B, two imageing sensor 102A, 102B, and the luminous cross of using in the calibration process 2.

The optical axis of the described first object lens 101A and the second object lens 101B is parallel to each other, and the first imageing sensor 102A and the second imageing sensor 102B lay respectively on the image planes of the described first object lens 101A and the second object lens 101B.The mid point of the line between the optical axis of the first object lens 101A and the second object lens 101B and the intersection point of object plane is made as an O, plane, luminous cross 2 place is overlapped with the object plane of the first object lens 101A and the second object lens 101B, and the central point of luminous cross 2 overlaps with some O, luminous cross 2 at the central point of the picture of the first imageing sensor 102A and the second imageing sensor 102B respectively as reference point O ₁With reference point O ₂

Measuring principle:

With reference to shown in Figure 2, Fig. 2 is a video eyeglasses binocular visual axis deviation detection method schematic diagram of the present invention.

Video eyeglasses 8 is placed on before the first object lens 101A and the second object lens 101B, the binocular emergent pupil 801A of video eyeglasses 8, the 801B line of centres overlap with entrance pupil 106A, 106B line of centres conllinear and the mid point of the first object lens 101A, the second object lens 101B, and the binocular emergent pupil face of video eyeglasses 8 is vertical with the optical axis of the second object lens 101B with the first object lens 101A, and then the plane, virtual screen place of video eyeglasses overlaps with the object plane of the first object lens 101A and the second object lens 101B.The center of the right and left eyes display screen of video eyeglasses 8 respectively produces a cross, by then producing cross virtual image P at object plane after the optical system of video eyeglasses ₁And P ₂, behind the first object lens 101A and the second object lens 101B, produce cross respectively as P at the first imageing sensor 102A and the second imageing sensor 102B ₁' and cross as P ₂', thereby obtain cross as P ₁' and cross as P ₂' central point and reference point O ₁With reference point O ₂Between apart from d ₁, d ₂Thereby, calculate the binocular visual axis deviation of video eyeglasses.Computing formula is as follows:

The range deviation formula of the video eyeglasses binocular optical axis on object plane is:

$D=d\×\frac{L}{L^{\′}}=d\×L\×(\frac{1}{f^{\′}}-\frac{1}{L})---\left(1\right)$

Because video eyeglasses emergent pupil distance and D are with respect to l in a small amount, so the angular deviation formula of the video eyeglasses binocular optical axis is:

$\mathrm{\θ}=\frac{D}{l}---\left(2\right)$

In the formula: D is the range deviation on object plane of the video eyeglasses optical axis, d is the distance between cross inconocenter point and the reference point on the imageing sensor, L is the object distance of object lens, L ' is an image distance, and f ' is the focal length of object lens, and l is the distance of object plane to the object lens entrance pupil, θ is the angular deviation of the video eyeglasses optical axis, wherein L ' f ', l are known parameters, and d is the parameter that measures to be checked, and video eyeglasses emergent pupil distance and D are with respect to l in a small amount.

Detect between the cross inconocenter point of the first imageing sensor 102A and the second imageing sensor 102B and the reference point apart from d ₁And d ₂After, calculate the range deviation and the angular deviation of the video eyeglasses right and left eyes optical axis respectively by formula (1) and formula (2).

For between the optical axis of the first fixing object lens 101A and the second object lens 101B apart from E, the video eyeglasses emergent pupil that can detect apart from the scope of e is:

E-(a-p)≤e≤E+(a-p) (3)

In the formula: E is the distance between the first object lens 101A and the second object lens 101B optical axis, and e is a video eyeglasses binocular emergent pupil distance, and a is the entrance pupil diameter of the first object lens 101A and the second object lens 101B, and p is a video eyeglasses binocular exit pupil diameter.

Description of drawings

Fig. 1 is a video eyeglasses binocular visual axis deviation calibration steps schematic diagram of the present invention;

Fig. 2 is a video eyeglasses binocular visual axis deviation detection method schematic diagram of the present invention;

Fig. 3 is the calibration structure synoptic diagram of first preferred embodiment of the present invention;

Fig. 4 is luminous cross front elevation;

Fig. 5 is luminous cross right view;

Fig. 6 is the front elevation of reflective cross;

Fig. 7 is the left view of reflective cross;

Fig. 8 is the detection architecture synoptic diagram of first preferred embodiment of the present invention;

Fig. 9 is the detection architecture synoptic diagram of second preferred embodiment of the present invention;

Embodiment

With embodiment detail of the present invention and method of operating are described in detail with reference to the accompanying drawings, but should limit protection scope of the present invention with this.

See also Fig. 3, Fig. 3 is the calibration structure synoptic diagram of first preferred embodiment of the present invention, and as seen from Figure 3: the device of the calibration process of first preferred embodiment of the present invention comprises main frame 1, calibration system, control system 5 and guide rail 6 compositions:

1. described main frame is for detecting the major part of video eyeglasses optical parametric, be made up of the first object lens 101A and the second object lens 101B, the first imageing sensor 102A and the second imageing sensor 102B, first sensor support 103A and the second sensor stand 103B, base 104, its position relation is: the described first object lens 101A and the second object lens 101B, first sensor support 103A and the second sensor stand 103B are positioned on the base 104.The optical axis of the first object lens 101A and the second object lens 101B is parallel to each other, the first imageing sensor 102A and the second imageing sensor 102B lay respectively on the first sensor support 103A and the second sensor stand 103B, by the adjustment of the first sensor support 103A and the second sensor stand 103B light-sensitive surface of the first imageing sensor 102A and the second imageing sensor 102B are adjusted to the image planes of the first object lens 101A and the second object lens 101B to overlap.

2. described calibration system is made up of luminous cross 2, adjustment rack 3, reflective cross 4.

See also Fig. 4 and Fig. 5, described luminous cross 2 comprises first four-bladed vane 201, frosted glass 202, light source 203, laser instrument 204, shell 205 and power supply 206 compositions.First four-bladed vane 201, frosted glass 202, light source 203 and laser instrument 204 are installed in 205 li on shell, and integral installation is on adjustment rack 3.206 pairs of light sources 203 of power supply and laser instrument 204 power supplies.There are a cross and center that a circular hole is arranged on first four-bladed vane 201, as shown in Figure 5.The light that light source 203 sends evenly throws light on to first four-bladed vane 201 after frosted glass 202 is dispersed.Also there is an aperture at the center of frosted glass 202 and light source 203, and the laser beam that laser instrument 204 sends is through outgoing after the aperture of light source 203, frosted glass 202 and first four-bladed vane 201.

Described adjustment rack 3 can make luminous cross 2 do four-dimensional the adjusting, comprises one dimension x translation stage 301 and one dimension y translation stage 302, two dimension angular adjustment rack 303 and base 304, by base 304 adjustment rack 3 is installed on the guide rail 6.One dimension x translation stage 301 and one dimension y translation stage 302 can make the translation on perpendicular to the xY both direction of guide rail of luminous cross 2, and two dimension angular adjustment rack 303 can make luminous cross 2 do level and luffing angle is regulated.

See also Fig. 6 and Fig. 7, described reflective cross 4 is installed on the main frame, be used to reflect luminous cross 2 emitted laser, reflective cross 4 comprises second four-bladed vane 401 and plane mirror 402, process on second four-bladed vane 401 one can printing opacity cross, the reflecting surface of plane mirror 402 leans against on the face of second four-bladed vane 401, and the reflecting surface of plane mirror 402 is vertical with the optical axis of two object lens, and the cross central point on second four-bladed vane 401 is positioned on the mid point of intersection point line of optical axis of plane mirror 402 planes, reflecting surface place and object lens 101A and object lens 101B.

3. control system 5 is used to control the first imageing sensor 102A and the second imageing sensor 102B images acquired, and image is handled demonstration with image, data.

4. the effect of guide rail 6 its guiding and location all is placed on main frame and calibration system on the guide rail in the calibration host process, is beneficial to guiding, location and measurement.

The described first object lens 101A and the second object lens 101B are that lens or the lens combination be made up of the polylith lens constitute.

The described first imageing sensor 102A and the second imageing sensor 102B can be charge-coupled image sensors, also can be the CMOS (Complementary Metal Oxide Semiconductor) devices.

The cross of described first four-bladed vane 201 can be to form by machining, also can be to form through photoetching.

Described control system 5 is personal computer, industrial computer, also can be the controller that other chips and circuit board are formed.

Described guide rail 6 optional parts, guide rail only play accelerates the effect regulate the speed, trimming process can be on ground or other body surfaces finish.

The step that the present invention's first preferred embodiment is proofreaied and correct is as follows:

1) main frame 1 and calibration system 5 are placed on the guide rail 6, adjust the distance between luminous cross 2 and the reflective cross 4;

2) open laser instrument 204;

3) regulate two dimension angular adjustment rack 303, the laser that laser instrument 204 is sent impinges upon the center of second four-bladed vane 401 of reflective cross 4;

4) observe the cross that reflects by reflective cross 4 and drop on position on first four-bladed vane 201,, make the center of luminous cross 2 move to the point midway of the cross line of centres that reflects with reflective cross 4 by regulating x translation stage 301 and y translation stage 302;

5) repeating step 3) and step 4), overlap with the center of luminous cross 2 up to the center of the cross of reflective cross 4 reflected backs;

6) close laser instrument 204, open light source 203 and illuminate first four-bladed vane 201;

7) regulate the first sensor support 103A and the second sensor stand 103B, make cross on the first imageing sensor 102A and the second imageing sensor 102B as clear;

8) obtain the central point of the cross picture on the first imageing sensor 102A and the second imageing sensor 102B by control system 5, and with it respectively as the reference point of the first imageing sensor 102A and the second imageing sensor 102B, finish the calibration of main frame.

See also Fig. 8, Fig. 8 is the detection architecture synoptic diagram of first preferred embodiment of the present invention.As shown in Figure 8: in the testing process, video eyeglasses 8 to be measured is installed on the main frame 1, and the right and left eyes emergent pupil face of video eyeglasses 8 overlaps with entrance pupil face 106A, the 106B of the first object lens 101A and the second object lens 101B.

The step of utilizing the present invention's first preferred embodiment to detect is as follows:

1) video eyeglasses 8 to be measured is installed on the main frame 1;

2) make the right and left eyes display screen center of video eyeglasses 8 respectively produce a cross by video eyeglasses 8 control device own;

3) obtain cross inconocenter point on the first imageing sensor 102A and the second imageing sensor 102B by control system 5, and calculate the range deviation and the angular deviation of the video eyeglasses 8 binocular optical axis according to the reference point that obtains in the calibration process;

4) by control system 5 output result and display images, finish detection.

See also Fig. 9, Fig. 9 is the detection architecture synoptic diagram of second preferred embodiment of the present invention.As shown in Figure 9, second preferred embodiment compared with first preferred embodiment: increased an object lens adjustment rack 107 on main frame 1, with other part position relations of main frame 1 be: described object lens adjustment rack 107 is installed on the base 104, the first object lens 101A and the second object lens 101B, first sensor support 103A and the second sensor stand 103B are positioned on the base object lens adjustment rack 107, by regulating the distance between the optical axis that object lens adjustment rack 107 can change the first object lens 101A and the second object lens 101B.The relative position of other parts of main frame 1 is identical with first preferred embodiment.

Compare with first preferred embodiment of the present invention, second preferred embodiment of the present invention can change the distance between the optical axis of the first object lens 101A and the second object lens 101B, and according to formula (3), this has increased the detectable video eyeglasses emergent pupil of device apart from scope.

Claims (7)

1. video eyeglasses binocular visual axis deviation detection device is characterized in that this device is made up of main frame (1), calibration system, control system (5):

Described main frame (1) is by structure identical first object lens (101A) and second object lens (101B), first imageing sensor (102A) that structure is identical and second imageing sensor (102B), first sensor support (103A) that structure is identical and second sensor stand (103B) and first base (104) are formed; Its position relation is: described first object lens (101A) and second object lens (101B) are fixed on described first base (104), first imageing sensor (102A) is installed on the described first sensor support (103A), second imageing sensor (102B) is installed on described second sensor stand (103B), again described first sensor support (103A) and second sensor stand (103B) are fixed on described first base (104), and described first object lens (101A), the optical axis of second object lens (101B) is parallel to each other, the light-sensitive surface of described first imageing sensor (102A) and second imageing sensor (102B) respectively with the picture planes overlapping of described first object lens (101A) and second object lens (101B);

Described calibration system is made up of luminous cross (2), adjustment rack (3), reflective cross (4):

Described luminous cross (2) is by first four-bladed vane (201), frosted glass (202), light source (203), laser instrument (204), shell (205) and power supply (206) are formed, described first four-bladed vane (201), frosted glass (202), light source (203) and laser instrument (204) are installed in described shell (205) lining, and integral installation is on adjustment rack (3), described power supply (206) is to described light source (203) and laser instrument (204) power supply, there are a spider and this spider that a center pit is arranged on described first four-bladed vane (201), also all there is a center pit at the center of described frosted glass (202) and light source (203), the center pit of described first four-bladed vane (201), the center pit of the center pit of frosted glass (202) and light source (203) is coaxial, to evenly illumination of first four-bladed vane (201), the laser beam that described laser instrument (204) sends is through described light source (203) after frosted glass (202) is dispersed for the light that described light source (203) sends, outgoing after the center pit of frosted glass (202) and first four-bladed vane (201);

In the described adjustment rack (3), an x is installed on second base (304) to translation stage (302) and two dimension angular adjustment rack (303) to translation stage (301) and a y, described luminous cross (2) be installed in described x to translation stage (301) and y on translation stage (302) and two dimension angular adjustment rack (303), described x is used to adjust the x of described luminous cross (2) to translation stage (302) to translation stage (301) and y, position on the y both direction, described two dimension angular adjustment rack (303) is regulated the luffing angle of described luminous cross (2), make described first four-bladed vane (201) be positioned at described first object lens (101A) and the public object plane of second object lens (101B), the mid point of the line between the optical axis of the center pit of described first four-bladed vane (201) and described first object lens (101A) and second object lens (101B) and the intersection point of object plane overlaps;

Described reflective cross (4) is pasted together formation mutually by second four-bladed vane (401) and plane mirror (402), the spider that a printing opacity is arranged on described second four-bladed vane (401), the reflecting surface of described plane mirror (402) leans on mutually with described second four-bladed vane (401), described reflective cross (4) is installed on the described main frame (1), the reflecting surface of described plane mirror (402) is vertical with the optical axis of second object lens (101B) with described first object lens (101A), and the central point of the spider on described second four-bladed vane (401) is positioned on the mid point of line of intersection point of optical axis of described plane mirror (402) plane, reflecting surface place and described first object lens (101A) and second object lens (101B);

Described control system (5) links to each other with second imageing sensor (102B) with described first imageing sensor (102A), and control and images acquired process and display view data.

2. video eyeglasses binocular visual axis deviation detection device according to claim 1 is characterized in that a guide rail (6) in addition, and described main frame (1) and calibration system are installed on this guide rail (6).

3. video eyeglasses binocular visual axis deviation detection device according to claim 1 is characterized in that described first object lens (101A) and second object lens (101B) are lens, or the lens combination of being made up of the polylith lens constitutes.

4. video eyeglasses binocular visual axis deviation detection device according to claim 1 is characterized in that described first object lens (101A), second object lens (101B), first sensor support (103A) and second sensor stand (103B) are installed on described first base (104) by an object lens adjustment rack (107).

5. video eyeglasses binocular visual axis deviation detection device according to claim 1 is characterized in that described first imageing sensor (102A) and second imageing sensor (102B) are charge-coupled image sensors, or the CMOS (Complementary Metal Oxide Semiconductor) device.

6. video eyeglasses binocular visual axis deviation detection device according to claim 1 is characterized in that described control system (5) is the controller that personal computer, industrial computer or other chips and circuit board are formed.

7. utilize the described video eyeglasses binocular visual axis deviation detection device of claim 2 to detect the method for video eyeglasses binocular visual axis deviation, it is characterized in that comprising the following steps:

1), main frame (1) and calibration system (5) are placed on the guide rail (6);

2), open laser instrument (204), regulate described two dimension angular adjustment rack (303), make laser radiation that laser instrument (204) sends center at second four-bladed vane (401) of described reflective cross (4), the spider that observation is reflected by described reflective cross (4) drops on the position on described first four-bladed vane (201), by regulate x to translation stage (301) and y to translation stage (302), the center that makes luminous cross (2) overlaps with the center of the spider that described reflective cross (4) reflects, and closes laser instrument (204);

3), open light source (203) and illuminate first four-bladed vane (201);

4), regulate first sensor support (103A) and second sensor stand (103B), make spider on first imageing sensor (102A) and second imageing sensor (102B) as clear;

5), obtain the center position of the spider picture on first imageing sensor (102A) and second imageing sensor (102B), respectively as the reference point O of first imageing sensor (102A) and second imageing sensor (102B) by control system (5) ₁With reference point O ₂

6), video eyeglasses to be measured (8) is installed on first base (104) of main frame (1), the binocular emergent pupil line of centres that makes video eyeglasses to be measured (8) and described first object lens (101A) and second object lens (101B) entrance pupil line of centres conllinear and mid point overlap, and the binocular emergent pupil face of video eyeglasses to be measured (8) is vertical with the optical axis of second object lens (101B) with first object lens (101A);

7), the control device by video eyeglasses to be measured (8) itself respectively produces a spider at the center of the left and right sides of video eyeglasses to be measured (8) glasses display screen, by then producing cross virtual image P at object plane after the optical system of video eyeglasses to be measured (8) ₁And P ₂, behind first object lens (101A) and second object lens (101B), produce cross respectively as P at first imageing sensor (102A) and second imageing sensor (102B) ₁' and cross as P ₂', thereby obtain cross as P ₁' and cross as P ₂' central point and reference point O ₁With reference point O ₂Between apart from d ₁, d ₂

8) by control system (5) with d ₁, d ₂The following formula of substitution calculates:

The range deviation D of the binocular optical axis of video eyeglasses to be measured on object plane ₁And D ₂:

The binocular vision shaft angle degree deviation θ of video eyeglasses to be measured ₁And θ ₂For:

In the formula: L is the object distance of first object lens (101A) and second object lens (101B), L ' is first object lens (101A) and second object lens (101B) image distance, f ' is the focal length of first object lens (101A) and second object lens (101B), l is the distance of object plane to first object lens (101A) and second object lens (101B) entrance pupil, wherein L ', f ', l are known parameters, and video eyeglasses emergent pupil distance to be measured and D are with respect to l in a small amount;

9), D ₁, D ₂, θ ₁, θ ₂Result of calculation be presented on the display screen, finish detection.

Images