Optical-System Design For Next-Generation Pushbroom Sensors
Abstract
Next-generation pushbroom sensors for earth observation require high-performance optics that provide high spatial resolution over wide fields of view. Specifically, blur diameters on the order of 10 to 15 pm are needed over 5° to 15° fields. In addition to this fundamental level of optical performance, other characteristics, such as spatial coregistration of spectral bands, flat focal plane, telecentricity, and workable pupil location are significant instrument design considerations. The detector-assembly design, optical line-of-sight pointing method and sensor packaging all hinge on these secondary attributes. Moreover, the need for broad spectral coverage, ranging from 0.4 to 12.5 μm, places an additional constraint on optical design. This paper presents alternate design forms that are candidates for wide-field pushbroom sensors, and discusses the instrument-design tradeoffs that are linked to the selection of these alternate optical approaches.
- Publication:
-
Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
- Pub Date:
- August 1984
- DOI:
- 10.1117/12.943064
- Bibcode:
- 1984SPIE..481...13M
- Keywords:
-
- Optical Measuring Instruments;
- Pushbroom Sensor Modes;
- Satellite-Borne Instruments;
- Systems Engineering;
- Design Analysis;
- Focal Plane Devices;
- High Resolution;
- Mirrors;
- Schmidt Telescopes;
- Spectral Sensitivity;
- Technological Forecasting;
- Spacecraft Instrumentation