CN104168428A - Active near-infrared photographing system - Google Patents
Active near-infrared photographing system Download PDFInfo
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- CN104168428A CN104168428A CN201410377284.6A CN201410377284A CN104168428A CN 104168428 A CN104168428 A CN 104168428A CN 201410377284 A CN201410377284 A CN 201410377284A CN 104168428 A CN104168428 A CN 104168428A
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- infrared
- active near
- active
- searchlight
- objective lens
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Abstract
The invention relates to an active near-infrared photographing system which comprises an objective lens set (1), an infrared imaging assembly (2), an ocular lens set (3) and an infrared searchlight (4). The objective lens set (1), the infrared imaging assembly (2) and the ocular lens set (3) are sequentially arranged in the straight line direction from an object (5) to the eyes. The infrared searchlight (4) is aligned to the object (5). According to the active near-infrared photographing system, by the adoption of a near-infrared laser device or a high-power LED, near-infrared bands can be photographed actively, and the active near-infrared photographing system can be widely applied to many fields of traffic, security and protecting monitoring and the like.
Description
Technical field
The present invention relates to a kind of system for near-infrared shooting, relate in particular to a kind of initiatively near-infrared photography system, belong to infrared imaging field.
Background technology
Photo electric imaging system, according to having or not lighting source, is divided into two kinds of modes of Active Imaging and passive imaging system.Imaging and passive imaging itself, without lighting source, relies on target or Ambient natural daylight or self radiation, and image device is accepted small-signal imaging.Active imaging system utilizes artificially lighting mode, adopts optical radiation source active illumination, and imaging detector is accepted scenery to the imaging of active illumination reflection of light.
Complete active near infrared imaging system performance testing should comprise two parts: system carries the limiting performance test of near-infrared light source performance test and imaging system.Initiatively near infrared imaging system is taking the integrated camera that carries near-infrared LED light source as example, and such video camera operating distance is generally larger, can reach hundreds of rice.Adopt its operating distance index of method detection of outdoor actual measurement very inconvenient.
Summary of the invention
In order to overcome the deficiencies in the prior art, resolve the problem of prior art, make up the deficiency of existing existing product in the market.
The invention provides a kind of initiatively near-infrared photography system, initiatively near-infrared photography system comprises objective lens, infrared imaging assembly, eyepiece group and infrared searchlight, described objective lens, infrared imaging assembly and the eyepiece group rectilinear direction between from target to human eye sets gradually, and described infrared searchlight aims at the mark.
Preferably, above-mentioned objective lens comprises multiple convex lens, concavees lens and condenser.
Preferably, above-mentioned infrared searchlight is near infrared laser.
Preferably, the image device that above-mentioned infrared imaging device is Si-CCD/CMOS or gleam image intensifier part.
Active near-infrared photography system provided by the invention has adopted near infrared laser or great power LED, can initiatively photograph near infrared band, has extensive use in many fields such as traffic, safety monitoring.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Reference numeral: 1-objective lens; 2-infrared imaging device; 3-eyepiece group; 4-infrared searchlight; 5-target; 6-human eye.
Embodiment
Understand and implement the present invention for the ease of those of ordinary skill in the art, below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
Be active near-infrared photography system of the present invention as shown in Figure 1, critical piece comprises near infrared illumination source, object lens, near infrared imaging device and eyepiece etc., has extensive use in many fields such as traffic, safety monitoring.Lighting source mainly adopts near infrared laser or great power LED.Conventionally image device or the gleam image intensifier part (gleam image intensifier and enhancing ICCD device) of selecting at present Si-CCD/CMOS in the imaging system of near infrared band, service band is in the near infrared spectrum district of 0.76～1.1 μ m.
Initiatively nearly red imaging system is a subjective process to the observation of target, needs the participation of human eye.The visual detection of human eye is in certain background, target to be identified.Now, the bright and sharp degree of the vision of human eye is relevant with brightness and the contrast of target in background of background.The contrast of target represents with contrast C,
In formula, L
tand L
bbe respectively the brightness of target and background.
Background luminance L
b, there is restricting relation (Wald law) between contrast C and the human eye target subtended angle α that can survey, particularly, in 7 ' time of target subtended angle α <, have
L
b·C
2·α
2＝const
It is famous Rose law.If in 1 ' time of α <, be just difficult to observe target.
From (2) formula, under certain condition, as background luminance L
b, target and background contrast C while determining, the discernmible minimum target subtended angle of human eye is also determined thereupon.
Active near-infrared photography system provided by the invention has adopted near infrared laser or great power LED, can initiatively photograph near infrared band, has extensive use in many fields such as traffic, safety monitoring.
The embodiment of the above is preferred embodiments of the present invention; not limit specific embodiment of the invention scope with this; scope of the present invention comprises and is not limited to this embodiment, and the equivalence that all shapes according to the present invention, structure are done changes all in protection scope of the present invention.
Claims (4)
1. an active near-infrared photography system, it is characterized in that: described active near-infrared photography system comprises objective lens (1), infrared imaging assembly (2), eyepiece group (3) and infrared searchlight (4), described objective lens (1), infrared imaging assembly (2) and eyepiece group (3) set gradually to the rectilinear direction human eye (6) from target (5), described infrared searchlight (4) aim at the mark (5).
2. active near-infrared photography system according to claim 1, is characterized in that: described objective lens (1) comprises multiple convex lens, concavees lens and condenser.
3. active near-infrared photography system according to claim 2, is characterized in that: described infrared searchlight (4) is near infrared laser.
4. active near-infrared photography system according to claim 1, is characterized in that: the image device that described infrared imaging device is Si-CCD/CMOS or gleam image intensifier part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410377284.6A CN104168428A (en) | 2014-07-29 | 2014-07-29 | Active near-infrared photographing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410377284.6A CN104168428A (en) | 2014-07-29 | 2014-07-29 | Active near-infrared photographing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104168428A true CN104168428A (en) | 2014-11-26 |
Family
ID=51912036
Family Applications (1)
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|---|---|---|---|
| CN201410377284.6A Pending CN104168428A (en) | 2014-07-29 | 2014-07-29 | Active near-infrared photographing system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201298131Y (en) * | 2008-04-24 | 2009-08-26 | 北京广元时代科技发展有限公司 | Laser night-shooting aerial digital camera |
| CN102745135A (en) * | 2012-07-24 | 2012-10-24 | 苏州工业园区七星电子有限公司 | Active vehicle infrared night vision system |
| CN103176273A (en) * | 2013-04-09 | 2013-06-26 | 孝感联成光电子科技有限公司 | Infrared imaging system for vehicle |
| CN204119352U (en) * | 2014-07-29 | 2015-01-21 | 奉化市宇创产品设计有限公司 | Initiatively near-infrared photography system |
-
2014
- 2014-07-29 CN CN201410377284.6A patent/CN104168428A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201298131Y (en) * | 2008-04-24 | 2009-08-26 | 北京广元时代科技发展有限公司 | Laser night-shooting aerial digital camera |
| CN102745135A (en) * | 2012-07-24 | 2012-10-24 | 苏州工业园区七星电子有限公司 | Active vehicle infrared night vision system |
| CN103176273A (en) * | 2013-04-09 | 2013-06-26 | 孝感联成光电子科技有限公司 | Infrared imaging system for vehicle |
| CN204119352U (en) * | 2014-07-29 | 2015-01-21 | 奉化市宇创产品设计有限公司 | Initiatively near-infrared photography system |
Non-Patent Citations (3)
| Title |
|---|
| 戴特力等: "《新光学教程》", 30 June 1995, 重庆大学出版社 * |
| 罗庆生等: "《光机电一体化系统常用机构》", 31 January 2009, 机械工业出版社 * |
| 金伟其等: "夜视领域几个热点技术的进展及分析", 《光学技术》 * |
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Application publication date: 20141126 |