CN110579342B - Glare measuring device and glare measuring method - Google Patents
Glare measuring device and glare measuring method Download PDFInfo
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- CN110579342B CN110579342B CN201911023259.7A CN201911023259A CN110579342B CN 110579342 B CN110579342 B CN 110579342B CN 201911023259 A CN201911023259 A CN 201911023259A CN 110579342 B CN110579342 B CN 110579342B
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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Abstract
The invention relates to a glare measuring device and a glare measuring method, wherein the glare measuring device comprises a light source, a shade and a receiver, wherein the light source is used for emitting parallel light beams; the mask comprises a first area positioned in the center and a second area surrounding the first area, wherein the first area is provided with a full black block which can not transmit light, and the second area is a transparent area; the receiver comprises a third area positioned in the center and a fourth area surrounding the third area, the optical system to be measured is positioned between the shade and the receiver, the third area is an image area of a full black color block, and the fourth area is an image area of a transparent area; the aperture is arranged between the light source and the shade or between the shade and the optical system to be measured, and the inner diameter of the aperture can be adjusted and is used for adjusting the light beam quantity passing through the second area. The glare measuring device and the glare measuring method can calculate the glare intensity caused by the light emitted from different positions of the light source or the light between the inner diameters of different apertures by changing the inner diameter of the aperture.
Description
Technical Field
The invention relates to the field of optical measuring devices, in particular to a glare measuring device and a glare measuring method.
Background
Glare, also known as Veiling Glare (Flare), is a phenomenon that when light emitted from a light source in an optical system passes through the optical system, the optical path of part of the light is distorted without depending on the design of the optical system, and enters a wrong receiving range position. The existing of glare is not in the original design of the optical system, so the distortion phenomenon of the optical path can not occur according to the design, the traditional glare measuring device or measuring method can only calculate a single ratio, and can not calculate the glare intensity caused by the light emitted from different positions of the light source independently, which is not beneficial to the subsequent reason search or the improvement of the optical path design.
Disclosure of Invention
Therefore, it is necessary to provide a glare measuring apparatus and a glare measuring method, which are directed to the problem of single calculation result of the conventional glare measuring apparatus or measuring method.
The glare measuring device comprises a light source, a shade and a receiver, wherein the light source is used for emitting parallel light beams; the mask comprises a first area and a second area, wherein the first area is located in the center, the second area surrounds the first area, the first area is provided with a completely black color block which can not transmit light, and the second area is a transparent area which can transmit light; the receiver comprises a third area positioned in the center and a fourth area surrounding the third area, the optical system to be measured is positioned between the shade and the receiver, the third area is an image area of the full black block, and the fourth area is an image area of the transparent area; the aperture is arranged between the light source and the shade or between the shade and the optical system to be measured, and the inner diameter of the aperture can be adjusted and is used for adjusting the light beam quantity passing through the second area; the glare measuring device can calculate the glare intensity caused by the light emitted from different positions of the light source or the light between the inner diameters of different apertures by changing the inner diameter of the aperture.
In one embodiment, the center of the light source, the center of the mask, the center of the aperture, the center of the optical system under test and the center of the receiver are on the same line.
In one embodiment, in a normal light path design, after the light beam passes through the first area of the mask and the optical system to be measured, an image of the full black block is formed in the third area of the receiver; after the light beam passes through the second area of the shade and the optical system to be detected, an image of the transparent area is formed in a fourth area of the receiver; in actual use, after part of the light beam passes through the second area of the mask and the optical system to be measured, the path does not twist according to the design of the optical system and reaches the third area of the receiver.
In one embodiment, the maximum inner diameter of the diaphragm is larger than the outer diameter of the full black block, and the maximum inner diameter of the diaphragm is larger than the outer diameter of the full black block
In one embodiment, the glare measuring apparatus further comprises a controller for adjusting and controlling the inner diameter of said aperture.
In one embodiment, the calculation formula of the glare intensity is that I ═ Q (Q)1-Q0)/(Q2-Q0) (ii) a Wherein I is the glare intensity, Q1Is the light intensity, Q, of the third region of the receiver2Is the light intensity, Q, of the fourth region of the receiver0Is the ambient light intensity of the receiver.
The invention also provides a glare measuring method of the glare measuring device, which comprises the following steps: adjusting the inner diameter of the aperture; recording the glare intensity measured by the receiver before and after adjusting the aperture; and calculating the absolute value of the difference value of the glare intensities before and after the aperture adjustment to obtain the glare intensity caused by the light emitted from different positions of the light source or the light between different aperture inner diameters independently.
In one embodiment, the glare measurement method further comprises the step of ratio calculation: and calculating the ratio of the glare intensity caused by the light emitted from different positions of the light source or the light between different aperture diameters alone to the total glare intensity, wherein the total glare intensity is the glare intensity measured by the receiver when the aperture diameter is adjusted to be maximum.
In one embodiment, when the inner diameter of the aperture is adjusted, the inner diameter of the aperture is adjusted to be the largest, and then the inner diameter of the aperture is gradually adjusted to be smaller; or, the inner diameter of the diaphragm is adjusted to be minimum, and then the inner diameter of the diaphragm is gradually adjusted to be larger; before adjusting the aperture, the receiver records the measured glare intensity I0(ii) a Glare intensity I measured by receiver after I-th adjustment of aperturei，Ii＝(Q1i-Q0i)/(Q2i-Q0i) I is a natural number, Q1iAdjusting the light intensity, Q, of the image area of the completely black block after the i-th aperture2iAdjusting the light intensity, Q, of the image area of the transparent area after the i-th aperture0iIs the ithAnd adjusting the ambient light intensity after the aperture.
In one embodiment, the absolute value of the difference between the glare intensities before and after the i-th adjustment of the aperture is calculated to obtain the glare intensity q caused by the light emitted from different positions of the light source or the light between different inner diameters of the aperture alonei,qi＝|Ii-Ii-1L, |; wherein, IiAdjusting the glare intensity after the aperture for the ith time; i isi-1The glare intensity before the aperture is adjusted for the i-th time.
The glare measuring device and the glare measuring method have the beneficial effects that:
according to the glare measuring device and the glare measuring method, the aperture with the adjustable inner diameter is arranged between the light source and the shade or between the shade and the optical system to be measured, the light beam quantity passing through the transparent area of the shade can be adjusted by adjusting the inner diameter of the aperture, and the glare intensity caused by the light emitted from different positions of the light source or the light between different aperture inner diameters or the light of different transparent areas of the shade can be obtained by calculating the difference value of the measured glare intensities before and after the aperture adjustment.
Drawings
FIG. 1 is a schematic view of the optical path of normal light of a glare measuring apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic view of a mask according to an embodiment of the present invention.
FIG. 3 is a schematic view of the light path of the glare light of the glare measuring apparatus according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of an aperture according to an embodiment of the present invention.
FIG. 5 is a schematic structural diagram of an embodiment of a glare measuring apparatus according to the present invention, wherein the aperture is at a second inner diameter.
FIG. 6 is a schematic structural diagram of an aperture of a glare measuring apparatus according to an embodiment of the present invention.
Reference numerals:
the system comprises a light source 100, a mask 200, a first area 210, a second area 220, an aperture 300, an optical system to be measured 400, a receiver 500, a third area 510 and a fourth area 520.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
In one embodiment, as shown in fig. 1, the glare measuring device comprises a light source 100, a mask 200, an aperture 300 and a receiver 500, wherein the light source 100 is used for emitting a parallel light beam; the mask 200 is disposed above the light source 100, the structure of the mask 200 is as shown in fig. 1 and 2, and includes a first region 210 located at the center and a second region 220 surrounding the first region 210, the first region 210 is provided with a completely black block through which light cannot pass, and the second region 220 is a transparent region through which light can pass. As shown in fig. 1, the receiver 500 includes a third area 510 located at the center and a fourth area 520 surrounding the third area 510, the optical system 400 to be measured is located between the mask 200 and the receiver 500, the third area 510 is an image area of a full black block, and the fourth area 520 is an image area of a transparent area.
In the normal optical path design, after the light beam emitted from the light source 100 passes through the first region 210 of the mask 200 and the optical system 400 to be tested, an image of a full black block is formed in the third region 510 of the receiver 500, and after the light beam emitted from the light source 100 passes through the second region 220 of the mask 200 and the optical system 400 to be tested, an image of a transparent region is formed in the fourth region 520 of the receiver 500, that is, in the normal optical path design,under the shielding effect of the mask 200, no light beam from the light source 100 reaches the third area 510 of the receiver 500, an image of the completely black block is formed in the third area 510 of the receiver 500, the third area 510 of the receiver 500 is completely black, and the fourth area 520 of the receiver 500 is bright due to the arrival of the light beam. However, in practical use, as shown in fig. 3, after a part of the light beam passes through the second region 220 of the mask 200 and the optical system 400 to be measured, the path is not distorted according to the design of the optical system to form glare, and reaches the third region 510 of the receiver 500, so that the image area of the completely black block corresponding to the third region 510 is not completely black. The formula of the glare measuring device for calculating the glare intensity I is I ═ Q1-Q0)/(Q2-Q0) (ii) a Wherein I is the glare intensity, Q1Is the light intensity, Q, of the third region 510 in the receiver 5002Is the light intensity, Q, of the fourth region 520 in the receiver 5000Is the ambient light intensity of the receiver 500.
In the embodiment shown in fig. 1 and 3, the aperture 300 is provided above the mask 200 with the solid black block as the center, and as shown in fig. 4, the inner diameter of the aperture 300 can be adjusted for adjusting the amount of light beam passing through the second area 220 of the mask 200, i.e., the transparent area of the mask 200. It should be noted that in the embodiment shown in fig. 4, only a schematic diagram of the diaphragm 300 being reduced from one inner diameter to another inner diameter is schematically shown, and the adjustable range of the inner diameter of the diaphragm 300 is not limited to the reduction range shown in fig. 4, and it should be understood that the maximum inner diameter of the diaphragm 300 is larger than the outer diameter of the all-black block. In addition, it should be noted that, in the embodiment shown in fig. 2, the aperture 300 is disposed above the mask 200, and it is understood that, in other embodiments, the aperture 300 may also be disposed between the light source 100 and the mask 200, or between the mask 200 and the optical system 400 to be measured, as long as the inner diameter of the aperture 300 is changed to change the amount of the light beam passing through the second region 220 of the mask 200.
In addition, in the embodiment shown in fig. 1 and 3, the center of the light source 100, the center of the mask 200, the center of the aperture 300, the center of the optical system 400 to be measured, and the center of the receiver 500 are on the same straight line, and thus the relative positions of the components of the glare measuring apparatus are adjusted. In addition, in one embodiment, the glare measuring apparatus further includes a controller for adjusting and controlling the inner diameter of the diaphragm 300.
In one embodiment, the glare measuring method of the glare measuring apparatus includes the steps of: adjusting the inner diameter of the aperture; recording the glare intensity measured by the receiver before and after adjusting the aperture; and calculating the absolute value of the difference value of the glare intensities before and after the aperture adjustment to obtain the glare intensity caused by the light emitted from different positions of the light source or the light between different aperture inner diameters or the light of different transparent areas of the mask independently.
As shown in fig. 3, 5, and 6, the inner diameter of the diaphragm 300 is adjustable between three shift positions. It should be noted that in the embodiments shown in fig. 3, 5 and 6, the path of the glare is only schematically drawn, which is not distorted according to the design of the optical system, so as to better represent the optical path of the glare and hide the normal optical path. When the diaphragm 300 is in the first gear position, as shown in fig. 3, the diaphragm 300 has a first inner diameter; when the diaphragm 300 is in the second shift position, as shown in fig. 5, the diaphragm 300 has a second inner diameter; when the diaphragm 300 is in the third gear position, as shown in fig. 6, the diaphragm 300 has a third inner diameter. The first inner diameter is greater than the second inner diameter, which is greater than the third inner diameter. As shown in fig. 3, when the aperture 300 is at the first inner diameter, the light beam emitted from the light source 100 passes through the second area 220 of the mask 200 with a larger amount, and accordingly, more light beam paths are not distorted according to the design of the optical system and reach the third area 510 of the receiver 500, so that the image area of the completely black block corresponding to the third area 510 is not completely black, and the glare intensity measured by the receiver 500 is I1. As shown in FIG. 5, when the diaphragm 300 is at the second inner diameter, the light beam emitted from the light source 100 passes through the second area 220 of the mask 200 and the light beam reaching the third area 510 of the receiver 500 without the path being distorted according to the design of the optical system is reduced, and the glare intensity measured by the receiver 500 is I2. As shown in FIG. 6, when the aperture 300 is at the third inner diameter, the light beam emitted from the light source 100 passes through the second region 220 of the mask 200 with the smallest amount and phaseAccordingly, the amount of light beam reaching the third area 510 of the receiver 500 without the path being distorted according to the design of the optical system is minimized, and the glare intensity measured by the receiver 500 is I3。
Glare intensity I1And glare intensity I2The difference value is the glare intensity generated by the corresponding light beam between the first inner diameter and the second inner diameter of the aperture 300; glare intensity I2And glare intensity I3The difference value is the glare intensity generated by the corresponding light beam between the second inner diameter and the third inner diameter of the diaphragm 300; glare intensity I1And glare intensity I3The difference is the glare intensity of the corresponding light beam between the first inner diameter and the third inner diameter of the aperture 300. In addition, since the regions between the different inner diameters of the diaphragm 300 correspond to different positions of the light source 100 and different transparent regions of the mask 200, the glare measuring apparatus can calculate the glare intensity caused by the light emitted from different positions of the light source 100, the light between the different inner diameters of the diaphragm 300, or the light of the different transparent regions of the mask alone by changing the inner diameter of the diaphragm 300.
In one embodiment, the glare measuring method of the glare measuring apparatus further includes the step of ratio calculation: the ratio of the glare intensity caused by the light emitted from different positions of the light source 100 or the light emitted from different inner diameters of the aperture 300 alone to the total glare intensity measured by the receiver 500 when the inner diameter of the aperture 300 is adjusted to the maximum is calculated. By calculating the ratio of the glare intensity caused by the light emitted from different positions of the light source 100 or the light within the inner diameters of the different apertures 300 to the total glare intensity, further analysis can be performed in the optical software, for example, if the glare is found to be serious at a certain position of the light source 100 or within a certain inner diameter range of the aperture 300, the optical path can be calculated by using the shape of the lens and the optical software in the optical system 400 to be tested, so as to conveniently find out the possible cause of the glare and the corresponding improvement mode.
In addition, in one embodiment, the glare measuring method of the glare measuring apparatus may adjust the inner diameter of the diaphragm 300 to be the maximum when adjusting the inner diameter of the diaphragm 300, and then gradually adjust the inner diameter of the diaphragm 300 to be the minimum; alternatively, it is also possibleTo minimize the inner diameter of the diaphragm 300 and then gradually increase the inner diameter of the diaphragm 300; before adjusting the aperture 300, the receiver 500 records the measured glare intensity I0(ii) a Glare intensity I measured by receiver 500 after I-th adjustment of aperture 300i，Ii＝(Q1i-Q0i)/(Q2i-Q0i) I is a natural number, Q1iAdjusting the intensity, Q, of the third region 510 of the receiver 500 after the i-th adjustment of the aperture 3002iFor the light intensity, Q, of the fourth area 520 of the receiver 500 after the i-th adjustment of the aperture 3000iThe intensity of the ambient light at the receiver after the i-th adjustment of the aperture 300 is adjusted.
In addition, the absolute value of the difference between the glare intensities before and after the i-th adjustment of the aperture 300 is calculated to obtain the glare intensity q caused by the light emitted from different positions of the light source 100 or the light between the inner diameters of the different apertures 300i,qi＝|Ii-Ii-1L, |; wherein, IiThe glare intensity after adjusting the aperture 300 for the ith time; i isi-1The glare intensity before the aperture 300 is adjusted for the i-th time.
In one embodiment, the glare measuring device reflects the glare intensity of different apertures 300 through the value of the anti-correlation Factor of the glare intensity, the value of the anti-correlation Factor of the glare intensity and the glare intensity are in an anti-correlation relationship, and the larger the value of the anti-correlation Factor of the glare intensity is, the more slight the influence of the glare is; the smaller the value of the anti-correlation Factor of the glare intensity, the more serious the influence of the glare. The outer diameter of the solid black block at the center of the mask 200 was 7mm, and the values of the anti-correlation Factor for obtaining different glare intensities by changing the inner diameter of the diaphragm 300 are shown in table 1, wherein the comparative example is a case where the glare measuring apparatus is not provided with the diaphragm 300.
TABLE 1 anti-correlation Factor values for different inner diameters of aperture 300 for different glare intensities
As can be seen from the data in table 1, the larger the inner diameter of the diaphragm 300 is, the smaller the value of the anti-correlation Factor of the glare intensity measured by the glare measuring device is, which indicates that the influence of the glare is more serious, and in addition, the data in table 1 also indicates that the glare measuring device of the present invention can calculate the glare intensity caused by the light emitted from different positions of the light source 100 or the light between the inner diameters of different diaphragms 300 alone by changing the inner diameter of the diaphragm 300.
According to the glare measuring device and the glare measuring method, the aperture with the adjustable inner diameter is arranged between the light source and the shade or between the shade and the optical system to be measured, the light beam quantity passing through the transparent area of the shade can be adjusted by adjusting the inner diameter of the aperture, and the glare intensity caused by the light emitted from different positions of the light source or the light between different inner diameters of the aperture or the light of different transparent areas of the shade can be obtained by calculating the difference value of the measured glare intensities before and after the aperture adjustment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A glare measuring apparatus, comprising:
a light source for emitting a parallel light beam;
the mask comprises a first area and a second area, wherein the first area is located in the center, the second area surrounds the first area, the first area is provided with a completely black color block which can not transmit light, and the second area is a transparent area which can transmit light;
the receiver comprises a third area positioned in the center and a fourth area surrounding the third area, the optical system to be measured is positioned between the shade and the receiver, the third area is an image area of the full black block, and the fourth area is an image area of the transparent area;
the aperture is arranged between the light source and the shade or between the shade and the optical system to be measured, the inner diameter of the aperture can be adjusted and is used for adjusting the light beam quantity passing through the second area, the maximum inner diameter of the aperture is larger than the outer diameter of the all-black block, and the center of the light source, the center of the shade, the center of the aperture, the center of the optical system to be measured and the center of the receiver are on the same straight line;
the glare measuring device can calculate the glare intensity caused by the light emitted from different positions of the light source or the light between the inner diameters of different apertures by changing the inner diameter of the aperture.
2. The glare measurement device of claim 1, wherein in a normal light path design, after the light beam passes through the first region of the mask and the optical system to be measured, an image of the all-black block is formed in the third region of the receiver; after the light beam passes through the second area of the shade and the optical system to be detected, an image of the transparent area is formed in a fourth area of the receiver; in actual use, after part of the light beam passes through the second area of the mask and the optical system to be measured, the path does not twist according to the design of the optical system and reaches the third area of the receiver.
3. The glare measuring apparatus of claim 1, further comprising a controller for adjusting and controlling the inner diameter of the aperture.
4. The glare measuring device according to claim 1, wherein the calculation formula of the glare intensity is I ═ Q (Q)1-Q0)/(Q2-Q0) (ii) a Wherein I is the glare intensity, Q1Is the receiver thirdLight intensity of the region, Q2Is the light intensity, Q, of the fourth region of the receiver0Is the ambient light intensity of the receiver.
5. The glare measuring method of the glare measuring apparatus of any one of claims 1 to 4, comprising the steps of:
adjusting the inner diameter of the aperture;
recording the glare intensity measured by the receiver before and after adjusting the aperture;
and calculating the absolute value of the difference value of the glare intensities before and after the aperture adjustment to obtain the glare intensity caused by the light emitted from different positions of the light source or the light between different aperture inner diameters independently.
6. The glare measurement method of claim 5, further comprising the step of ratio calculation: and calculating the ratio of the glare intensity caused by the light emitted from different positions of the light source or the light between different aperture diameters alone to the total glare intensity, wherein the total glare intensity is the glare intensity measured by the receiver when the aperture diameter is adjusted to be maximum.
7. The glare measuring method according to claim 5, wherein the inner diameter of the diaphragm is adjusted to be the largest and then gradually decreased when the inner diameter of the diaphragm is adjusted; or, the inner diameter of the diaphragm is adjusted to be minimum, and then the inner diameter of the diaphragm is gradually adjusted to be larger; before adjusting the aperture, the receiver records the measured glare intensity I0(ii) a Glare intensity I measured by receiver after I-th adjustment of aperturei，Ii＝(Q1i-Q0i)/(Q2i-Q0i) I is a natural number, Q1iAdjusting the light intensity, Q, of the image area of the completely black block after the i-th aperture2iAdjusting the light intensity, Q, of the image area of the transparent area after the i-th aperture0iThe post-iris ambient light intensity is adjusted for the ith time.
8. The glare measurement method of claim 7, wherein the i-th adjustment is calculatedThe absolute value of the difference value of the glare intensities before and after the aperture obtains the glare intensity q caused by the light emitted from different positions of the light source or the light between different aperture diameters independentlyi,qi＝|Ii-Ii-1L, |; wherein, IiAdjusting the glare intensity after the aperture for the ith time; i isi-1The glare intensity before the aperture is adjusted for the i-th time.
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