| 摘要 |
<p>Sunlight sensor for use in a spacecraft like e.g. a satellite which in operation orbits around the earth outside the earth sphere, the sensor comprising an optoelectrical element which can be exposed to incident sunlight. The optoelectrical element is solely sensitive for a wavelength which corresponds to a wavelength area in the sunlight spectrum in which sunlight incident to the earth sphere is not substantially reflected by the earth sphere, e.g. either by applying filters between the incident sunlight and the optoelectrical element, which constituted to pass solely light within said wavelength area, or by applying a dedicated optoelectrical material which is optoelectrically sensitive within said wavelength area. Preferred wavelength lie within the areas of 200-300 nm, 1350-1450 nm or 1800-1950 nm. Optoelectrical material optoelectrically sensitive for the wavelength area of 200-300 nm is e.g. diamond, AlGaN, SiC or UV enhanced Si. For the range from about 1350-1450 nm InGaAs can be applied as optoelectrically sensitive material, to be used in combination with relevant filters.</p> |
