Optical: systems and elements – Lens – With multipart element
Patent
1990-03-20
1991-12-10
Arnold, Bruce Y.
Optical: systems and elements
Lens
With multipart element
359900, B29D 1100, G02B 308
Patent
active
050712365
ABSTRACT:
This invention relates to a replica plate having a transparent plastic substrate and a photo-cured resin, and a projection type television using the replica plate. An adhesive layer comprising an acrylic or methacrylic compound is provided between a transparent plastic plate and a replica-forming photo-curable resin, whereby it is possible to enhance the adhesion between the surface of the transparent plastic plate and the photo-cured resin, and to produce a replica plate having excellent optical characteristics, good replicating properties and high reliability. The adhesive layer can be provided (1) by coating a layer containing the acrylic or methacrylic compound on the plastic plate, the compound infiltrating into the plate, or (2) by incorporating the acrylic or methacrylic compound into the photo-curable resin, the compound infiltrating therefrom into the plate; in this latter technique, the plate coated with the resin should be heated. This invention has contribution to enhancement of the performance of projection type screens for television, optical parts such as lenses, and products associated with optical disks.
REFERENCES:
patent: 4440586 (1984-04-01), Lippits et al.
patent: 4737447 (1988-04-01), Suzuki et al.
patent: 4959431 (1990-09-01), Watanabe et al.
Iwano Chiyoko
Miwa Hiroaki
Onodera Hiroyuki
Sudo Ryoichi
Tajima Tetsuo
Arnold Bruce Y.
Gass Rebecca D.
Hitachi , Ltd.
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