High-efficiency holograms on the basis of polarization recording by means of beams from opposite directions
| Autor: | Igor D. Shatalin |
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| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.19371 |
| Popis: | The possibility of polarization holographic recording of a standing wave in the case when the same (right or left) circularly polarized plane coherent light waves propagate in opposite directions has been discussed. The propagation of a normally incident circularly polarized wave along the helical structure formed in a photoanisotropic medium has been discussed by means of the Jones matrix method. The selective reflection of the circularly polarized component of mcident light from such a reflectance hologram is possible. When summing up two coherent light waves with different polarization states the summary field is characterized by a definite distribution both the intensity and resulting polarization. The use of photoanisotrophic media enables us to make a polarization-holographic recording of the summary field and to reconstruct polarization state of the object wave from the obtained hologram. 2 3 If we use two beams with orthogonal right and left circular polarization '' which spread at a small angle with each other the projected picture of the summary fields in the hologram plane has the form of a periodic structure corresponding to a linear polarization with orientation rotation of the resulting vector from O to 180 within the period. The absence of intensity modulation on the hologram plane leads to a uniform distribution of the values of light-induced anisotropy. Th use of photoanisotropic media on the basis of mordant azo dyes intrc1uced into gelatin matrix |
| Databáze: | OpenAIRE |
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