Facsimile reproducer records spatially well-registered true-color and false-color video data on tape. Proposed optical arrangement allows light sources to be adjusted along the mirror scanning direction in such a manner that no electronic delays are required if the reproducer is operated synchronously with the camera

Burcher, E. E.

Huck, F. O.

English

NASA Technical Reports Server

October 1970	 .	 Brief 70-10360 
NASA TECH BRIEF 
-4r 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage commercial 
application. Tech Briefs are available on a subscription basis from the National Technical Information Service, Springfield, 
Virginia 22151. Requests for individual copies or questions relating to the Tech Brief progam may be directed to the Tech-
nology Utilization Division, NASA, Code UT, Washington, D.C. 20546. 
Multispectral Facsimile Reproducer 
- 
CE
- _ 
Figure 1. Optical Principle; Schematic 
The ability of a monospectral (black and white) 
facsimile reproducer has been extended to record spa-
tially well-registered true-color and false-color video 
data on tape. False-color is caused by a wavelength 
conversion occurring between the scene radiance and 
the film exposure. 
Figure 1 shows the principle of the proposed op-
tical configuration for the recording of spatially well-
registered color on film. Each of several electrical 
signals, derived from different detector-filter combi-
nations in the facsimile camera (Fig. 2A) and brought 
into proper spatial registration by electronic delays, 
modulates a different light source in the facsimile 
reproducer (Fig. 2B). The modulated radiation from 
each light source is passed through a separate filter 
and pinhole. Each pinhole is located at the focal point 
of a small lens which collimates the radiation. The 
collimated radiation is passed through a larger lens
which focuses these rays to a single point. Scanning 
with this point over a relatively slowly moving color 
film, in such a manner that successive line scans are 
contiguous, provides spatially well-registered color ex-
posure of the film. 
This optical arrangement also allows the light 
sources to be adjusted along the mirror scanning 
direction in such a manner that no electronic delays 
are required if the reproducer is operated syn-
chronously with the camera. This scheme has oper-
ated successfully. 
Note: 
Requests for further information may be directed 
to:
Technology Utilization Officer 
Langley Research Center 
Hampton, Virginia 23365 
Reference: TSP70- 10360
(continued overleaf) 
This document was prepared under the sponsorship of the National 	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States
	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States 	 will be free from privately owned.rights.
https://ntrs.nasa.gov/search.jsp?R=19700000347 2020-03-17T00:40:54+00:00Z
Mirror 
Film, advances into 
(or out of) plain 
D	 shown as camera 
rotates in azimuth 
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be.made to NASA Code GP, 
Washington, D.C. 20546. 
Source: F.O. Huck and E.E. Burcher 
Langley Research Center 
(LAR- 106 18) 
Light Source	 FiRer	 Large Lens	 Axis of Rotation 
Mirror
Video 
Signal 
Input 
Lens 
Fill 
Es
Video 
Signal 
Output 
Figure 2. Configurations of Facsimile Camera for Mültispectral Images (A)--
and Facsimile Reproducer (B): Schematic
Brief 70-10360	 Category 03


Multispectral facsimile reproducer

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