| 摘要 |
PURPOSE:To prevent the appearance of the image of an infrared ray spot on a reproduced image while keeping excellent color reproducibility by setting up transmissivity in the wavelength area of autofocusing range finding infrared rays to a sufficiently small value close to zero. CONSTITUTION:The transmissivity in the wavelength area of autofocusing infrared rays is set up to a sufficiently small value close to zero. Namely, autofocusing infrared rays are sufficiently attenuated even if it is made incident upon the title infrared ray cutting filter, and almost of the infrared rays are not made incident upon a sensor. Although the wavelength of the infrared rays may be dispersed in the vicinity of 870nm by a light emitting diode, the transmissivity including the range of the dispersion can be set up to said sufficiently small value, so that the image of an infrared ray spot does not appear on the image. |
