Apparatus for optically reading a reflecting record carrier

Details Apparatus for optically reading a reflecting record carrier Apparatus for optically reading a reflecting record carrier

1974-11-07

1976-04-13

Canney, Vincent P.

1791003L, 17910041L, H04N 576, G11B 2110

Patent

active

039506215

ABSTRACT:
An apparatus is described for optically reading an information carrier, which carrier is provided with an optical structure in accordance with the information.
Both at the top side and the underside of the carrier shoes are disposed, which together with said sides constitute air pads in such a way that the ratio of the rigidity of the air pad at the carrier side provided with the information to the rigidity of the air pad at the carrier side which faces away from the information is 1 : n-1, n being the refractive index of the carrier body.

REFERENCES:
patent: 3833769 (1974-09-01), Compaan et al.
patent: 3855426 (1974-12-01), Bouwhuis
patent: 3876842 (1975-04-01), Bouwhuis

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