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 SM ISO690:2012CHAPURIN, Igor, PANASYUK, Lev, TUVAL, Miron, ROSHKOVAN, Gersh, BERNFELD, Benjamin. Halftone imaging on photothermoplastic media by interference prerastering. In: Proceedings of SPIE - The International Society for Optical Engineering, Ed. 10, 2-6 martie 1997, Jerusalem. Bellingham, Washington: SPIE, 1997, Ediția 10, Vol.3110, pp. 500-508. ISSN 0277-786X. DOI: https://doi.org/10.1117/12.281369 |
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 Proceedings of SPIE - The International Society for Optical Engineering Ediția 10, Vol.3110, 1997 |
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Conferința "10th Meeting on Optical Engineering in Israel" 10, Jerusalem, Israel, 2-6 martie 1997 | ||||||
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| DOI:https://doi.org/10.1117/12.281369 | ||||||
| Pag. 500-508 | ||||||
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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. |
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| Cuvinte-cheie Grating, Halftone, Partial erasure, photothermoplastic, Pregrating, Raster, Second charging |
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