RU97101424A - LIGHT LENS FOR THE NEAR IR SPECTRUM AREA - Google Patents
LIGHT LENS FOR THE NEAR IR SPECTRUM AREAInfo
- Publication number
- RU97101424A RU97101424A RU97101424/28A RU97101424A RU97101424A RU 97101424 A RU97101424 A RU 97101424A RU 97101424/28 A RU97101424/28 A RU 97101424/28A RU 97101424 A RU97101424 A RU 97101424A RU 97101424 A RU97101424 A RU 97101424A
- Authority
- RU
- Russia
- Prior art keywords
- component
- lens
- focal length
- light lens
- spectrum area
- Prior art date
Links
- 238000001228 spectrum Methods 0.000 title claims 2
- 230000005499 meniscus Effects 0.000 claims 1
Claims (1)
0,35f' < d1 + d2 + d3 + d4 + d5 < 0,45f';
0,5 < r3/r4 < 0,65;
0,2f' < d6 < 0,3f';
1,45 < n4 < 1,53,
где фокусное расстояние первого и второго компонентов;
фокусное расстояние первого третьего компонентов;
d1 - d6 - толщины и воздушные промежутки в объективе;
r3, r4 - радиусы кривизны второго компонента;
фокусное расстояние четвертого компонента;
n4 - показатель преломления линзы четвертого компонента;
f' - фокусное расстояние объектива.A fast lens for the near infrared region of the spectrum containing four components, the first component being a positive lens, the second component a positive meniscus convex to the object, the third component a negative lens, the fourth component a positive lens, characterized in that the first component convex flat lens, the third component is a flat-concave lens, the fourth component is a biconvex lens, and the following relations hold:
0.35f ' <d 1 + d 2 + d 3 + d 4 + d 5 <0.45f ' ;
0.5 <r 3 / r 4 <0.65;
0.2f ' <d 6 <0.3f ' ;
1.45 <n 4 <1.53,
Where focal length of the first and second components;
focal length of the first third component;
d 1 - d 6 - thickness and air gaps in the lens;
r 3 , r 4 are the radii of curvature of the second component;
focal length of the fourth component;
n 4 is the refractive index of the lens of the fourth component;
f ' is the focal length of the lens.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU97101424A RU2104572C1 (en) | 1997-01-29 | 1997-01-29 | Wide-aperture lens for near infrared light |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU97101424A RU2104572C1 (en) | 1997-01-29 | 1997-01-29 | Wide-aperture lens for near infrared light |
Publications (2)
Publication Number | Publication Date |
---|---|
RU2104572C1 RU2104572C1 (en) | 1998-02-10 |
RU97101424A true RU97101424A (en) | 1998-04-20 |
Family
ID=20189492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU97101424A RU2104572C1 (en) | 1997-01-29 | 1997-01-29 | Wide-aperture lens for near infrared light |
Country Status (1)
Country | Link |
---|---|
RU (1) | RU2104572C1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EA000569B1 (en) * | 1998-04-21 | 1999-12-29 | Открытое Акционерное Общество "Пеленг" | Objective for apparatus of night vision sight |
JP2012173562A (en) * | 2011-02-22 | 2012-09-10 | Tamron Co Ltd | Infrared lens |
-
1997
- 1997-01-29 RU RU97101424A patent/RU2104572C1/en active
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