METHOD AND DEVICE FOR INFRARED RAY IMAGE PICKUP

• Main Author: MUROFUSHI HIROSHI
• Format: Patent
• Language: English
• Published: 28.03.1997
• Edition: 6
• Subjects: COLORIMETRY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; RADIATION PYROMETRY; TESTING

PROBLEM TO BE SOLVED: To reduce deterioration in the image quality by selecting a ratio of light quantity incident onto an infrared ray sensor from a measured object through a scanning optical system to a light quantity of an image of the infrared ray sensor itself incident onto again the infrared ray sensor through the reflection of the scanning optical system to be higher so as to suppress narcissus to be low. SOLUTION: An optical filter 2 whose transmissivity is is inserted obliquely onto an optical path for a scanning optical system 1 and an infrared ray sensor 3 to reduce the narcissus amount by the transmissivity of the optical filter. Furthermore, a face with a low reflectance is arranged to a reflection optical path of the optical filter so that the image of the infrared ray sensor reflected in the optical filter is not again made incident onto the infrared ray sensor.