CN2195681Y - Anti-stray light interfering photoelectric searching unit - Google Patents
Anti-stray light interfering photoelectric searching unit Download PDFInfo
- Publication number
- CN2195681Y CN2195681Y CN 94202047 CN94202047U CN2195681Y CN 2195681 Y CN2195681 Y CN 2195681Y CN 94202047 CN94202047 CN 94202047 CN 94202047 U CN94202047 U CN 94202047U CN 2195681 Y CN2195681 Y CN 2195681Y
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- China
- Prior art keywords
- convex lens
- light
- lens
- utility
- photoelectric
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a photoelectric probe for the automatic light changing controllers for the headlights of vehicles during meeting, which comprises a casing and a convex lens which is installed in the casing and is used for receiving light. The external surface of the convex lens is provided with transparent covering film of which the refractive index is greater than that of the convex lens. The utility model can eliminate the partial interference of sundry light and improve the sensitivity of controllers.
Description
The utility model belongs to the photoelectric probe of automobile meeting headlight automatic beam change controller.
Headlight is set to distance light to automobile at dark road traveling night, and the light flat fire is to illuminate road surface, the place ahead, and when head-on having car to come, if still keep the high beam irradiation, strong light direct projection the other side driver causes the other side driver normally to travel, and is prone to accidents.Therefore, traffic rules regulations, two cars should be set to dipped beam with headlight for vehicles in the time of 100～200 meters, light is died down and be partial to the below, and this switching past automatic beam change controller occurred in recent years by driver operation.
Existing automatic beam change controller in the disclosed technical scheme of 91232502.X utility model patent, provides a kind of and the photoelectric probe controller split, becomes light to receive the other side in certain distance light signal control headlight of sending a car.The photoelectric probe of this scheme is still deposited many shortcomings in practicality.For example, the convex lens that adopt optical glass to manufacture are gathered opposite car lamp source signal, are subject to disturb the generation erroneous judgement disconnected from the veiling glare of road both sides.
The purpose of this utility model is the new technical scheme that proposes a kind of light variable controller photoelectric probe, disturbs big shortcoming to overcome the existing veiling glare of aforementioned utility model patent scheme.
Content of the present utility model is:
Automobile meeting headlight automatic beam change controller photoelectric probe, comprise housing, be contained in the convex lens that receive light in the housing, be contained on the focus of convex lens rear portion, receive the photoelectric sensor that planoconvex lens focuses on back light, the lens of one deck refractive index greater than convex lens are arranged at the outer surface of convex lens.
Described lens can be that one deck has enough thickness, can make incident ray produce the transparent overlay film of refraction.
Characteristics of the present utility model are the surfaces at convex lens, be to increase the lens of a refractive index on the optical signal plane of incidence greater than convex lens, refraction principle according to the natural daylight that discloses in the ordinary optical, the incidence angle that comes from the veiling glare of road surface two surveying is during greater than the cirtical angle of total reflection, can be reflected, though another part is less than the cirtical angle of total reflection, but after reflecting during to the convex lens outer surface greater than convex lens be focused into firing angle veiling glare, will can not shine focus place light sensor contact, the veiling glare of having got rid of considerable part by contrast disturbs.
Embodiment of the present utility model is as shown in drawings:
Accompanying drawing: the design's light path principle schematic diagram
Wherein shown by reference numeral is represented respectively:
1, convex lens 2, cover mirror I, veiling glare bundle a, cover the mirror incidence point
B, convex lens incidence point c, air incidence point d, be image point
O, focus light sensor IA allow polarization angle
In conjunction with the accompanying drawings the design is specified:
The design's photoelectric probe is to add one deck refractive index to cover mirror 2 greater than convex lens on the plane of incidence of existing probe convex lens 1..Make veiling glare bundle I produce refracted ray ab in covering mirror, refracted ray is bc in convex lens, goes out the focus o that becomes behind the convex lens its d point of light cd to depart from former convex lens 1.The photoelectric sensor of being located at focus o place does not just receive this veiling glare signal.Sensor is a sphere in former photoelectric probe, therefore makes convex lens that a polarization angle IA be arranged.All light that advances convex lens in the IA angle all can be received by sensor.The shoe film that has added the big refractive index of one deck has many side direction veiling glares in the IA scope just to be excluded outside photosensor region afterwards, thereby has dwindled the IA angle, has reduced the interference of veiling glare to sensor.
Overlay film thickness on the design's convex lens will make refraction be produced at least, and the thick more IA angle actual permission matter that makes of film is more little, and promptly the sensor of big spherical surface body can receive the photosignal in the less IA angle.Concrete thickness can be calculated with the relation at the IA angle that will control according to its index of refraction and sensor spherical surface body size.
Claims (2)
1, a kind of automobile meeting headlight automatic beam change controller, comprise housing, be contained in the convex lens that receive light in the housing, be contained in and receive the photoelectric sensor that planoconvex lens focuses on back light on the focal length of convex lens rear portion, it is characterized in that the lens of one deck refractive index greater than convex lens being arranged at the outer surface of convex lens.
2, controller as claimed in claim 1 is characterized in that described lens are overlay films of layer of transparent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202047 CN2195681Y (en) | 1994-02-01 | 1994-02-01 | Anti-stray light interfering photoelectric searching unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202047 CN2195681Y (en) | 1994-02-01 | 1994-02-01 | Anti-stray light interfering photoelectric searching unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2195681Y true CN2195681Y (en) | 1995-04-26 |
Family
ID=33821937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94202047 Expired - Fee Related CN2195681Y (en) | 1994-02-01 | 1994-02-01 | Anti-stray light interfering photoelectric searching unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2195681Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064906A (en) * | 2016-12-12 | 2017-08-18 | 东莞市美光达光学科技有限公司 | A kind of anallatic lens module and laser ranging system |
-
1994
- 1994-02-01 CN CN 94202047 patent/CN2195681Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064906A (en) * | 2016-12-12 | 2017-08-18 | 东莞市美光达光学科技有限公司 | A kind of anallatic lens module and laser ranging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Chuangda Electronic Technology United Corp., Beijing Document name: payment instructions |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Chuangda Electronic Technology United Corp., Beijing Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |