| 摘要 |
An optical scanner is incorporated in a thermal imaging system which generates high resolution images at commercial T.V. rates while scanning relatively large apertures. A facet mirror (25) is mounted for rotation about a vertical rotational axis (33), and a framing mirror (43) is mounted on the optical axis (51) for oscillation about a horizontal oscillatory axis (59). An off axis, magnifying relay lens system (41) including an objective lens (45) and an eyepiece (47) re-images the pupil at the facet mirror onto the framing mirror, so that there is a real pupil at the framing mirror with no image artifacts. The relay lens system (41) is located in the optical path between the facet mirror (25) and the framing mirror (43) and provides a magnification of about 1.8. The relay lens system defines an image plane (53) and at least one point blockbody is located substantially at the image plane for purposes of providing a video reference and calibration. A detector (21) receives the focused beam of radiation reflected by the facet mirror through a collimator (23) for subsequent display on commercial T.V. monitors (19). The detector shares vacuum with the high-speed scanner. |
