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Optical scanner
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1987 |
| Description | An optical scanner for imaging lines in an object plane onto a linear array in a focal plane either continuously or discretely is described. The scanner consists of a set of four mutually perpendicularly oriented plane corner mirrors which provide a reflecting path that describes a parallelogram. In addition, there is a plane parallel scanning mirror with a front and back reflecting surface located midway between the first and fourth corner mirrors. It is oriented so that in the mid-scan position it is parallel to the first corner mirror, and therefore perpendicular to the fourth corner mirror. As the scan mirror rotates, rays incident from a plurality of lines in the object plane are selectively directed through the optical system arriving at a common intersection on the back surface of the scanning mirror where the rays are colinearly directed toward a lens and then imaged onto the linear array in the focal plane. A set of compensating mirrors may be introduced just before the imaging lens to compensate for a small and generally negligible path difference delta sub l between the axial and marginal rays. |
| File Size | 587296 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870012246 |
| Archival Resource Key | ark:/13960/t9d55hz1v |
| Language | English |
| Publisher Date | 1987-03-03 |
| Access Restriction | Open |
| Subject Keyword | Optics Optical Measurement Rotating Mirrors Optical Scanners Imaging Techniques Modulation Transfer Function Line Spectra Radiometric Correction Focal Plane Devices Incidence Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
