First Generation CVROS Scanner
The CVROS First Generation Scanner integrates the CVROS optics with the Scan Disc drive motor, Framing Mirror drive galvanometer and housing with its machined-in optics mounts. The arrangement of the components is shown in the exploded parts diagram below. All are housed in a compact unit, small enough to fit into a submarine periscope head.
Some differences from the prototype optics are shown in the diagram.. The Collection Mirror is nreplaced by a Collection Lens and a pair of fold mirrors. This allows certain packaging objectives to be met. Also, the apertures of the Scan Disc Mirrors, or “dimples”, as they became known, changed from circular to trapezoidal in shape. The radii of curvature remain identical to the dimples of the protoype disc.. The trapezoidal shape results automatically when the dimple is cut deeper into the disc substrate. The trapezoidal dimples improve system light throughput.
The further addition of an infrared detector, detector cooling means, motor drive, control and signal processing electroniics results in the world’s smallest infrared thermal imaging system of the time, circa 1980.
The Scan Disc rotates at about 40, 000 revolutions per minute to create the lines of a television raster. The Framing Mirror sequentially registers the lines into a raster image at the rate of 30 frames per second. The resultant scanner system output is a standardized television signal which can be displayed on an ordinary television set.
Further details on the scanner can be found at “CVROS IRIS Paper“, the first public presentation of the concept, rationale, and application example. It was presented at a meeting of the Infrared Information Symposia society in 1984.