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Proceedings Paper

Halftone imaging on photothermoplastic media by interference prerastering
Author(s): Igor V. Ciapurin; Lev M. Panasiuk; Miron Tuval; Gersh Roshkovan; Benjamin Bernfeld
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Paper Abstract

This paper refers to the study of processes conducting to halftone image recording on photothermoplastic media (PTPM) by the preliminary formation of raster surface gratings. Whenever a pre-rastering recording method is used, it has two charging cycles which include: (1) Preliminary formation of raster grating by recording an interference grating on the PTPM surface; (2) Partial non-charging thermal erasure of the raster grating by continuous PTPM heating; (3) Examination of the photographic characteristics of rastered gray-scale images during recording by a second charging of PTPM. The methodology employed provides the necessary diffraction efficiency (DE) in the illuminated areas of the PTPM as well as a low DE value in background areas, so as to achieve a maximum PTPM photosensibility of up to S equals 106 cm2/J, and a contrast coefficient (gamma) equals 1.4, while the maximum contrast value of recorded images is Km greater than 40.

Paper Details

Date Published: 22 September 1997
PDF: 9 pages
Proc. SPIE 3110, 10th Meeting on Optical Engineering in Israel, (22 September 1997); doi: 10.1117/12.281369
Show Author Affiliations
Igor V. Ciapurin, State Univ. of Moldova (Moldova)
Lev M. Panasiuk, State Univ. of Moldova (Moldova)
Miron Tuval, TAHEL 18 Ltd. (Israel)
Gersh Roshkovan, TAHEL 18 Ltd. (Israel)
Benjamin Bernfeld, Dr. Bernfeld Engineering (Germany)


Published in SPIE Proceedings Vol. 3110:
10th Meeting on Optical Engineering in Israel
Itzhak Shladov; Stanley R. Rotman, Editor(s)

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