Infrared imaging apparatus and infrared monitoring apparatus for vehicle
US6919565B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2002 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Jan 8, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/89
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To obtain an image signal in which the distance to a target can be recognized, an infrared imaging apparatus 47 comprises an infrared irradiation unit 48 for radiating infrared radiation in an attenuation wavelength range in which the infrared radiation is attenuated according to the transmitted distance and an infrared imaging unit 49 for detecting infrared radiation emitted from the target and infrared radiation reflected by the target, and outputting an image signal. When the infrared irradiation unit 48 irradiates infrared in an attenuation wavelength range, that is, an absorption wavelength range wherein the transmittance in the air is small and the absorption in the air is high, the intensity of the reflected light from the target varies according to the distance to the target. The infrared imaging unit 49 detects the reflected light from the target which is attenuated depending on the distance in addition to and superposed to the infrared radiation emitted from the target. In this manner, an image signal in which the infrared components are superposed, that is, an image signal in which the distance to the target can be recognized, can be output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.