Optical: systems and elements – Polarization without modulation – Polarizarion by dichroism
Patent
1994-12-08
1996-11-26
Dzierzynski, Paul M.
Optical: systems and elements
Polarization without modulation
Polarizarion by dichroism
359498, 359496, 359583, 359586, 359588, G02B 530, G02B 110
Patent
active
055791590
ABSTRACT:
A beam splitter having an optical multilayer thin film is disclosed. The optical multilayer thin film is formed by laminating six layers in sequence. The laminated six layers comprise: a first layer, a third layer and a fifth layer each having a refractive index from 1.63 to 1.64; a second layer and a sixth layer each having a refractive index from 1.37 to 1.38, a fourth layer having a refractive index from 1.9 to 2.3; in which light is allowed to be incident upon the first layer of the optical multilayer thin film at the angle of incidence equal to or greater than 40.degree.. The reflectances of S and P polarized components of reflected light are substantially equal to each other over a wide wavelength range and substantially no phase difference exists between the S and P polarized components. The beam splitter having a multilayer polarizing light separating film formed between an incoming side prism and an outgoing side prism is extremely high in the reflectance of the P polarized component of reflected light, in comparison with that of the S polarized component of the same reflected light.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Dzierzynski Paul M.
Jr. John Juba
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