Halftone imaging on photothermoplastic media by interference prerastering

Igor V. Ciapurin; Lev M. Panasiuk; Miron Tuval; Gersh Roshkovan; Benjamin Bernfeld

doi:10.1117/12.281369

22 September 1997 Halftone imaging on photothermoplastic media by interference prerastering

Igor V. Ciapurin, Lev M. Panasiuk, Miron Tuval, Gersh Roshkovan, Benjamin Bernfeld

Proceedings Volume 3110, 10th Meeting on Optical Engineering in Israel; (1997) https://doi.org/10.1117/12.281369
Event: 10th Meeting on Optical Engineering in Israel, 1997, Jerusalem, Israel

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 K_m greater than 40.

Citation Download Citation

Igor V. Ciapurin, Lev M. Panasiuk, Miron Tuval, Gersh Roshkovan, and Benjamin Bernfeld "Halftone imaging on photothermoplastic media by interference prerastering", Proc. SPIE 3110, 10th Meeting on Optical Engineering in Israel, (22 September 1997); https://doi.org/10.1117/12.281369

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