Method for fixing a prism and a solid-state image pickup element

• US 8,063,974 B2
• Filed: 03/01/2010
• Issued: 11/22/2011
• Est. Priority Date: 06/29/2004
• Status: Active Grant

• Current Assignee: Takami Hasegawa
• Original Assignee: Takami Hasegawa
• Inventors: Hasegawa, Takami
• Primary Examiner(s): Tran; Sinh
• Assistant Examiner(s): GEBRIEL, SELAM T
• Application Number:
  US12/659,206
• Publication Number:
  US 20100212825A1
• Time in Patent Office: 631 Days
• Field of Search: 348/373, 348/337, 348/338, 348/336
• US Class Current: 348/336
• CPC Class Codes: G02B 27/1013 for colour or multispectral image sensors, e.g. splitting an image into monochromatic image components on respective sensors spectral imaging systems G01J
• CPC Class Codes: G02B 27/145 having sequential partially reflecting surfaces
• CPC Class Codes: G02B 7/00 Mountings, adjusting means, or light-tight connections, for optical elements
• CPC Class Codes: H04N 23/16 Optical arrangements associated therewith, e.g. for beam-splitting or for colour correction
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils

Abstract

In fixing prisms for a TV camera and solid-state image pickup element packages, two holding plates are fixed at two sides of each of the prisms, each of the holding plates having a wedge-shaped or semicircular tip surface, and an adhesive is provided in a gap formed by a surface of the solid-state image pickup element package and the wedge-shaped or semicircular tip surface of the holding plate, respectively. Then, relative to light axes, X, Y and Z axes and rotational axes θx, θy and θz for the axes X, Y, and Z of the solid-state image pickup element packages are aligned while inclining the holding plates in a front-rear direction simultaneously. The adhesive is cured by applying light or heat to thereby fix the holding plates, the solid-state image pickup elements and the prisms, respectively.

Claims

1. Method of fixing prisms for a TV camera and solid-state image pickup element packages, comprising:

fixing two holding plates at two sides of each of the prisms, each of the holding plates having a wedge-shaped or semicircular tip surface,

abutting the wedge-shaped or semicircular tip surfaces of the holding plates always against a surface of the solid-state image pickup element package to form a gap directly between the surface of the solid-state pickup element package and the wedge-shaped or semicircular tip surface of the holding plate, respectively,

supplying an adhesive in the gap formed directly between the surface of the solid-state image pickup element package and the wedge-shaped or semicircular tip surface of the holding plate, respectively, said adhesive being photocurable adhesive or thermosetting adhesive,

aligning, relative to light axes, X, Y and Z axes and rotational axes θ

x, θ

y and θ

z for the axes X, Y, and Z of each of the solid-state image pickup element packages while inclining the holding plates in a front-rear direction simultaneously, the axes X, Y, and Z being perpendicular to each other, and

curing the adhesive situated in the gap directly between the surface of the solid-state pickup element package and the wedge-shaped or semicircular tip surface of the holding plate by applying light or heat to thereby fix the holding plates, the solid-state image pickup elements and the prisms, respectively.

2. The method according to claim 1, wherein additional holding plates are directly laminated on the holding plates by an adhesive, which is cured by the light or heat when the holding plates, the solid-state image pickup elements and the prisms are cured.

3. The method according to claim 1, further comprising inserting the adhesive and a bar in the gap formed by the surface of the solid-state image pickup element package and the wedge-shaped or semicircular tip surface of the holding plate.

4. The method according to claim 3, wherein the bar is made of a material selected from the group consisting of transparent glass, ceramic and metal materials, the bar having a thermal expansion coefficient approximating to those of the prisms.

5. The method according claim 1, wherein the adhesive contains translucent spherical fillers.

6. The method according to claim 1, wherein the gap between the surface of the solid-state image pickup element package and the wedge-shaped has a triangular shape in cross section.

7. The method according to claim 6, wherein the adhesive is cured by irradiation of ultraviolet light.