| 摘要 |
PURPOSE:To easily and inexpensively perform DC reproduction, by setting the average radiation quantity from an objective space as a reference standard. CONSTITUTION:Afocal optical systems 1, 2 have a function of condensing the infrared rays from an object as luminous flux. A mechano-optical scanner 4 has a function of scanning the incident luminous flux all over in a two-dimensional space. An image forming lens 5 has a function of forming the luminous flux into an image on an infrared ray detector 6 and the infrared ray detector 6 has a function of outputting an electric signal corresponding to the intensity of the incident infrared rays. The radiation from an objective space is condensed by a condenser 71 and transmitted to a focal plane 3 by a non-imaging type optical fiber 7 to obtain a reference standard level and the signal corresponding to said reference level is clamped to reproduce a DC component. |
