JP2007058240A5

JP2007058240A5 -

Info

Publication number: JP2007058240A5
Application number: JP2006304709A
Authority: JP
Filing date: 2006-11-10
Publication date: 2008-10-09
Anticipated expiration: 2021-09-03

Claims

A prism that separates colored light from incident light or synthesizes and emits a plurality of colored lights,
A plurality of triangular prisms are bonded together,
A thin film was provided between the adhesive layer and the prism surface in all or part of the bonded portion.
Prism characterized by that.

One of the thin films is a single layer film, and the other is a multilayer film that reflects a specific color light.
The prism according to claim 1.

Four triangular prisms are used,
A multilayer film that reflects specific color light is formed in four of the eight bonded portions,
A single-layer film was formed at the other four bonded parts.
The prism according to claim 1.

Four triangular prisms are used,
A multilayer film that reflects specific color light is formed in four of the eight bonded portions,
A single-layer film was formed at the other three bonded parts.
The prism according to claim 1.

The single layer film is composed of SiOx (x is a number including a decimal point from 1 to 2), or SiOx. ₂₂ It is a mixed material of aluminum oxide
The prism according to claim 2, 3, or 4.

SiO ₂₂ And the mixed material of aluminum oxide has a light refractive index in the range of about 1.48 to 1.54.
The prism according to claim 5.

The multilayer film includes a layer of SiOx (x is a number including a decimal point from 1 to 2).
The prism according to any one of claims 2 to 6, wherein:

The triangular prism prism is a plastic material.
The prism according to any one of claims 1 to 7, wherein:

An optical unit for a projection display device,
A panel that modulates the separated color light based on image information;
A plurality of triangular prisms are bonded together, and a dichroic thin film or single-layer thin film is provided between the adhesive layer and the prism surface in all or part of the bonded portion, and color modulation of the modulated light from the panel is performed. And the exiting prism,
An optical unit comprising projection means for enlarging and projecting the color-synthesized light on a screen.

An optical unit according to claim 9,
A driving circuit for driving the panel;
Power circuit for driving the light source
A projection type display device characterized by that.

A method of manufacturing a prism,
A step of injection-molding the prismatic prism with plastic;
Holding the molded product in a temperature range of a predetermined range for a predetermined time;
Then the cooling step;
Forming a first reflective film;
Forming a single layer film and attaching a triangular prism;
Forming a second reflective film and bonding the triangular prisms;
To manufacture a prism
A method of manufacturing a prism characterized by the above.

A prism that separates incident light into different kinds of polarized light,
A plurality of triangular prisms are bonded together,
A thin film is provided between the adhesive layer and both prism surfaces in the bonding portion,
The thin film is a single layer film, and the other is a polarized light separation film having selectivity for polarized light.
Prism characterized by that.

A prism according to claim 12;
A panel that modulates the separated color light based on image information;
A drive circuit for driving the panel;
And projection means for enlarging and projecting the color synthesized light on the screen.
A projection type display device characterized by that.