| 摘要 |
<p>A selective optical detector for detecting a substantially punctual light susceptible of being collected in a predetermined wavelength range and visual angle is provided with an optical collector element made of a light-transparent material having wavelengths comprised within a predetermined range and a light-sensitive detector element. The invention is characterized in that the optical collector system has a focus surface characteristic of the predetermined wavelength range and which is located at a certain distance from the focus surfaces which are characteristic of the wavelengths outside of said range. The detector element is optically connected to the optical collector system by an opening provided in the focus surface pertaining to the predetermined wavelength range. The size of the opening substantially corresponds to the size of the surface of the focus of the light coming from the predetermined visual angle and pertaining to the predetermined wavelength range.</p> |
