CN113777780B - Flat display picture compatibility evaluation method for military laser protection lens - Google Patents
Flat display picture compatibility evaluation method for military laser protection lens Download PDFInfo
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- CN113777780B CN113777780B CN202111017819.5A CN202111017819A CN113777780B CN 113777780 B CN113777780 B CN 113777780B CN 202111017819 A CN202111017819 A CN 202111017819A CN 113777780 B CN113777780 B CN 113777780B
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- 238000011156 evaluation Methods 0.000 title description 4
- 238000002834 transmittance Methods 0.000 claims abstract description 39
- 230000001681 protective effect Effects 0.000 claims abstract description 29
- 238000001228 spectrum Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000003595 spectral effect Effects 0.000 claims description 14
- 238000011161 development Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000009472 formulation Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 3
- 210000003128 head Anatomy 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
Abstract
The invention discloses a flat-display picture and double-function of a military laser protection lensThe method for evaluating the capacity comprises the following steps: measuring the maximum brightness value and the spectrum curve of the in-cabin head-up display picture; measuring a transmittance curve of a required laser protective lens; calculating the head-up transmittance TR of the laser protection lens according to the spectrum curve of the head-up and the transmittance curve of the laser protection lens Lens The method comprises the steps of carrying out a first treatment on the surface of the Calculating the laser protection lens head-up transmission coefficient TR required by the human eyes to see the head-up under the high altitude light-receiving condition according to the maximum brightness value of the in-cabin head-up display picture Index (I) The method comprises the steps of carrying out a first treatment on the surface of the The calculated laser protective lens head-up transmission coefficient TR Lens Head-up transmission coefficient TR required for making head-up visible to the human eye Index (I) In contrast, when TR Lens ≥TR Index (I) When the laser protection lens is used, the observation requirement of the head-up display picture can be met, and otherwise, the observation requirement of the head-up display picture cannot be met. The invention can be used as the basis for quantitative index formulation, and simultaneously greatly reduces the test cost and improves the development efficiency.
Description
Technical Field
The invention relates to the technical field of aviation equipment, in particular to a method for evaluating the compatibility of a head-up display picture of a military laser protection lens.
Background
The military laser protective lens is used as an important component of the pilot helmet, and is required to be perfectly compatible with optical environments such as a head-up display picture, an indicator lamp and the like in an aircraft cabin while playing a role of laser protection.
According to the visual characteristics of human eyes, in order to ensure the sensitivity and the visual comfort of human eyes, the center wavelength of the display screen of the head-up display is usually 544nm. According to the current band range of the domestic and foreign laser weapons, the military laser protection lens needs to protect lasers in the two bands, namely 532nm and 1064nm, and the laser protection requirement is that the 0D value is not less than 3 (the transmittance of the laser protection lens at 532nm is 0.1%). Because the protection wave band (532 nm) is very close to the central wave band (544 nm) of the head-up display, if the laser protection lens is made to have a problem, the laser protection lens can absorb most of the light of the head-up display picture while protecting 532nm laser, so that the head-up display is difficult to observe, and particularly, when the head-up display is in high-altitude light-receiving flight condition and has high background brightness, a pilot can hardly see the head-up display picture.
The existing evaluation method of the compatibility of the military laser protective lens and the head-up display picture is mainly measured through actual head-up display observation, and particularly, in the present stage, a pilot reflects that the head-up display cannot be clearly seen under the conditions that the laser lens is in high altitude and faces the sun to fly and the head-up display can be clearly seen under the conditions that the laser lens faces away from the sun and the ground, so that the head-up display observation affects the present stage, only the upper-day test flight party can be evaluated, the development progress is seriously affected, and the development cost is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for evaluating the compatibility of a flat display picture of a military laser protective lens, which can be used as a basis for making quantitative indexes, greatly reduces test cost and improves development efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for evaluating the compatibility of a head-up display picture of a military laser protection lens comprises the following steps:
step 1, measuring the maximum brightness value L of a flat display picture in a cabin Flat display And spectral curve S Flat plate (λ)；
Step 2, measuring a transmittance curve T (lambda) of the laser protective lens to be checked;
step 3, according to the spectrum curve S of the head-up display Flat plate (lambda) and laser protective lens transmittance curve T (lambda) calculate the head-up transmittance TR of the laser protective lens Lens ；
Step 4, according to the maximum brightness value L of the in-cabin head-up display picture Flat display Calculating the head-up transmittance TR of the laser protection lens required by the eyes of the human to see the head-up clearly under the high altitude light-receiving condition Index (I) ；
Step 5, the calculated laser protection lens head-up transmittance TR Lens Head-up transmission coefficient TR required for making head-up visible to the human eye Index (I) In contrast, when TR Lens ≥TR Index (I) When the laser protective lens can meet the requirement of the flat display pictureAnd (5) observing the requirement, otherwise, not meeting the requirement.
According to the technical scheme, in the step 1, the maximum brightness value L of the in-cabin head-up display picture is measured through the spectrum analyzer and the brightness meter Flat display And spectral curve S Flat plate (λ)。
According to the above technical scheme, in the step 2, the transmittance curve T (λ) of the laser protection lens to be checked is measured by a spectrophotometer.
According to the above technical scheme, in the step 3, the head-up transmittance TR of the laser protection lens Lens ，TR Lens The ratio of the relative head up transmittance of the laser protective lens in the visible light range to the relative solar transmittance of the laser protective lens is defined as follows:
wherein S is Flat plate (lambda) is a spectrum curve of the head-up display, and is actually measured by a spectrum analyzer; s is S Sunlight (lambda) is a spectral curve of sunlight, which can be obtained by looking up a table; t (lambda) is the transmittance curve of the laser protective lens, and is measured by a spectrophotometer.
According to the technical scheme, in the step 4, the maximum brightness is 36000cd/m according to the high altitude flight 2 And contrast ratio 1.2 required for normal observation of human eyes combined with maximum brightness value L of in-cabin head-up display picture Flat display And calculating the head-up transmittance coefficient of the laser protection lens required by the human eyes to clearly see the head-up under the high altitude light-receiving condition.
According to the technical scheme, in the step 4, the human eyes can clearly see the transmittance of the head-up laser protective lens required by the head-up laser in the high altitude light-receiving condition
In which L Flat display For displaying the maximum brightness value of the display picture, the brightness meter is used for measuring the brightnessActually measured.
The invention has the following beneficial effects:
according to the invention, after the related optical index of the head-up display is measured in advance, the head-up display transmission coefficient is used as the index of the laser lens, the optical compatibility evaluation of the laser protection lens and the head-up display picture can be quantitatively evaluated only by calculating the head-up display transmission coefficient, the head-up display transmission coefficient can be used as the basis for making a quantitative index, the test cost is greatly reduced, and the development efficiency is improved.
Drawings
FIG. 1 is a graph of spectrum of a head up display in an embodiment of the invention;
FIG. 2 is a graph of transmittance of a typical laser protective lens according to an embodiment of the invention;
FIG. 3 is a graph of the spectrum of sunlight in an embodiment of the invention.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
Referring to fig. 1 to 3, the method for evaluating the compatibility of a flat display screen of a military laser protection lens according to an embodiment of the present invention includes the following steps:
step 1, measuring the maximum brightness value L of a flat display picture in a cabin Flat display And spectral curve S Flat plate (λ)；
Step 2, determining a transmittance curve T (lambda) of the required laser protection lens;
step 3, according to the spectrum curve S of the head-up display Flat plate (lambda) and laser protective lens transmittance curve T (lambda) calculate the head-up transmittance TR of the laser protective lens Lens ；
Step 4, according to the maximum brightness value L of the in-cabin head-up display picture Flat display Calculating the head-up transmittance TR of the laser protection lens required by the eyes of the human to see the head-up clearly under the high altitude light-receiving condition Index (I) ；
Step 5, the calculated laser protection lens head-up transmittance TR Lens Head-up transmission coefficient TR required for making head-up visible to the human eye Index (I) In contrast, when TR Lens ≥TR Index (I) When the laser protection lens is used, the observation requirement of the head-up display picture can be met, and otherwise, the observation requirement of the head-up display picture cannot be met.
Further, in the step 1, the maximum brightness value L of the in-cabin head-up display screen is measured by a spectrum analyzer and a brightness meter Flat display And spectral curve S Flat plate (λ)。
Further, in the step 2, the transmittance curve T (λ) of the laser protection lens to be checked is measured by a spectrophotometer.
Further, in the step 3, the head-up transmittance TR of the laser protection lens Lens ：
Wherein S is Flat plate (lambda) is the spectral curve of the head-up; s is S Sunlight (lambda) is the spectral curve of sunlight; t (lambda) is the transmittance curve of the laser protection lens.
Further, in the step 4, the maximum brightness is 36000cd/m according to the high altitude flight 2 And contrast ratio 1.2 required for normal observation of human eyes combined with maximum brightness value L of in-cabin head-up display picture Flat display And calculating the head-up transmittance coefficient of the laser protection lens required by the human eyes to clearly see the head-up under the high altitude light-receiving condition.
Further, in the step 4, the human eyes can see the transmittance of the laser protection lens head-up required by the head-up clearly under the high altitude light-receiving condition
In which L Flat display The maximum brightness value of the display picture is displayed.
In one embodiment of the present invention, taking the head-up performance of a certain type of aircraft as an example, it is described by taking as an example whether a certain type of laser protection lens meets the head-up observation requirement:
first, the in-cabin flatness is measured by using a spectrum analyzerThe spectral distribution of the display screen is shown in FIG. 1, and is denoted as S Flat plate (lambda) and the test results are shown in Table 1.
TABLE 1 spectral distribution of certain head-ups
| Wave band (nm) | Spectral values |
| 532 | 27.93764 |
| 534 | 32.19672 |
| 536 | 60.77858 |
| 538 | 143.4885 |
| 540 | 171.7374 |
| 542 | 183.3666 |
| 544 | 187.459 |
| 546 | 183.1203 |
| 548 | 175.1271 |
| 550 | 160.4268 |
| 552 | 133.7159 |
| 554 | 83.94143 |
| 556 | 31.58072 |
Measuring maximum display brightness L of in-cabin head-up display picture by using brightness meter Flat display The measurement result was 8900cd/m 2 。
The transmittance curve T (λ) of a certain type of laser protection lens was then measured using a spectrophotometer, and the result is shown in fig. 2.
Calculating to obtain the head-up transmittance of a certain laser protective lens:
and calculating to obtain the head-up transmittance index required by the head-up display:
comparison to available TR Lens ＜TR Index (I) The laser protection lens cannot meet the observation requirement of the head-up display, and the risk that the head-up display cannot be seen clearly under the high-altitude light-receiving condition exists.
The foregoing is merely illustrative of the present invention and is not intended to limit the scope of the invention, which is defined by the claims and their equivalents.
Claims (5)
1. A method for evaluating the compatibility of a flat display picture of a military laser protection lens is characterized by comprising the following steps:
step 1, measuring the maximum brightness value L of a flat display picture in a cabin Flat display And spectral curve S Flat plate (λ)；
Step 2, measuring a transmittance curve T (lambda) of the laser protective lens;
step 3, according to the spectrum curve S of the head-up display Flat plate (lambda) and laser protective lens transmittance curve T (lambda) calculate the head-up transmittance TR of the laser protective lens Lens ；
Step 4, according to the maximum brightness value L of the in-cabin head-up display picture Flat display Calculating the head-up transmittance TR of the laser protection lens required by the eyes of the human to see the head-up clearly under the high altitude light-receiving condition Index (I) ；
Step 5, the calculated laser protection lens head-up transmittance TR Lens Head-up transmission coefficient TR required for making head-up visible to the human eye Index (I) In contrast, when TR Lens ≥TR Index (I) When the laser protective lens meets the observation requirement of the head-up display picture, otherwise, the laser protective lens does not meet the observation requirement;
in the step 3, the head-up transmittance TR of the laser protective lens Lens ：
Wherein S is Flat plate (lambda) is the spectral curve of the head-up; s is S Sunlight (lambda) is the spectral curve of sunlight; t (lambda) is the transmittance curve of the laser protection lens.
2. The method for evaluating the compatibility of a head-up display screen of a military laser protective lens according to claim 1, wherein in said step 1, the maximum brightness value L of the in-cabin head-up display screen is measured by a spectrum analyzer and a brightness meter Flat display And spectral curve S Flat plate (λ)。
3. The method for evaluating the compatibility of a flat display screen of a military laser protective lens according to claim 1, wherein in the step 2, a transmittance curve T (λ) of the laser protective lens to be evaluated is measured by a spectrophotometer.
4. The method for evaluating the compatibility of a head-up display screen of a military laser protective lens according to claim 1, wherein in said step 4, the maximum brightness is 36000cd/m according to the high altitude flight 2 And contrast ratio 1.2 required for normal observation of human eyes combined with maximum brightness value L of in-cabin head-up display picture Flat display And calculating the head-up transmittance coefficient of the laser protection lens required by the human eyes to clearly see the head-up under the high altitude light-receiving condition.
5. The method for evaluating the head-up display picture compatibility of a military laser protective lens according to claim 4, wherein in said step 4, the head-up display transmission coefficient of the laser protective lens required for the human eye to see the head-up display clearly under high altitude light conditions
In which L Flat display Is the maximum brightness value of the display picture.
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| CN202111017819.5A CN113777780B (en) | 2021-08-31 | 2021-08-31 | Flat display picture compatibility evaluation method for military laser protection lens |
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| CN202111017819.5A CN113777780B (en) | 2021-08-31 | 2021-08-31 | Flat display picture compatibility evaluation method for military laser protection lens |
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| CN113777780B true CN113777780B (en) | 2023-11-03 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2197941A (en) * | 1986-11-24 | 1988-06-02 | British Aerospace | Nvg and sunlight readable indicators |
| CN87208076U (en) * | 1987-05-13 | 1988-06-22 | 南京工学院 | Protecting glasses for multiband laser |
| JP2006023666A (en) * | 2004-07-09 | 2006-01-26 | Sony Corp | Display device |
| FR2958757A1 (en) * | 2010-04-09 | 2011-10-14 | Thomson Licensing | Color corrective spectacles i.e. anaglyph vision spectacles, have glass provided with color filter, where coordinates are defined in two specific equations respectively when coordinates are in space of color that presents distribution |
| WO2016085767A1 (en) * | 2014-11-30 | 2016-06-02 | Perriquest Defense Research Enterprises, Llc | Spectrally filtered eyewear |
| WO2021123858A1 (en) * | 2019-12-19 | 2021-06-24 | Essilor International | Screen friendly optical article |
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- 2021-08-31 CN CN202111017819.5A patent/CN113777780B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2197941A (en) * | 1986-11-24 | 1988-06-02 | British Aerospace | Nvg and sunlight readable indicators |
| CN87208076U (en) * | 1987-05-13 | 1988-06-22 | 南京工学院 | Protecting glasses for multiband laser |
| JP2006023666A (en) * | 2004-07-09 | 2006-01-26 | Sony Corp | Display device |
| FR2958757A1 (en) * | 2010-04-09 | 2011-10-14 | Thomson Licensing | Color corrective spectacles i.e. anaglyph vision spectacles, have glass provided with color filter, where coordinates are defined in two specific equations respectively when coordinates are in space of color that presents distribution |
| WO2016085767A1 (en) * | 2014-11-30 | 2016-06-02 | Perriquest Defense Research Enterprises, Llc | Spectrally filtered eyewear |
| US9829724B1 (en) * | 2014-11-30 | 2017-11-28 | Perriquest Defense Research Enterprises, Llc | Spectrally filtered eyewear |
| WO2021123858A1 (en) * | 2019-12-19 | 2021-06-24 | Essilor International | Screen friendly optical article |
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| CN113777780A (en) | 2021-12-10 |
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