| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical filter that enables adjustment of light amounts in both color photography and monochromatic photography in order to obtain an excellent image.SOLUTION: An optical filter 12 includes a light wavelength attenuation film 22 that attenuates transmittance of visible light wavelength and infrared light wavelength on one face of a transparent substrate 21 of the optical filter 12, and an infrared light wavelength shielding film 22 that shields infrared light wavelength is formed on part of the other face of the transparent substrate 21. The optical filter 12 is arranged in an optical imaging system so as to enable adjustment of light amounts in both color photography and monochromatic photography, thereby contributing to miniaturization of an imaging apparatus. |
