Planar type lens manufacturing method

• US 20010054478A1
• Filed: 07/16/2001
• Published: 12/27/2001
• Est. Priority Date: 10/24/1997
• Status: Abandoned Application

• Current Assignee: Hidetoshi Watanabe, Tomotaka Ito
• Original Assignee: Hidetoshi Watanabe, Tomotaka Ito
• Inventors: Watanabe, Hidetoshi, Ito, Tomotaka
• Application Number:
  US09/904,561
• Publication Number:
  US 20010054478A1
• Time in Patent Office: Days
• US Class Current: 156/241
• CPC Class Codes: B29C 70/64 the filler influencing the surface characteristics of the material, e.g. by concentrating near the surface or by incorporating in the surface by force
• CPC Class Codes: B29D 11/00 Producing optical elements, e.g. lenses or prisms grinding or polishing of optical elements B24B; constructional form of optical elements G02B; optical parts of spectacles G02C7/00
• CPC Class Codes: Y10T 428/24372 Particulate matter
• CPC Class Codes: Y10T 428/24926 including ceramic, glass, porcelain or quartz layer

Abstract

A sure and efficient manufacturing method of a translucent type screen using micro glass beadsis probided. A carbon toner is scattered onto micro glass beads which are buried and fixed in a UV curable resin layer, and the carbon toner is uniformly filled in the gaps between the micro glass beads by a rotating brush or a press roll or the like. The supply and filling of the carbon toner may be simultaneously performed by an air jet nozzle. Subsequently, an extra fine fiber cloth, sticky tape, sticky roll or the like is continuously brought into contact with the upper surface of the carbon toner to remove the carbon toner at the light emission portion of the micro glass beads.

Claims

1. A planar type lens manufacturing method comprising:

a step of forming a transparent sticky layer on a transparent base;

a step of supplying plural transparent fine spheres onto said transparent sticky layer;

a step of burying said plural transparent fine spheres in said transparent sticky layer in a depth which is substantially equal to the half of the diameter thereof;

a step of supplying colored material so that said colored material is filled in at least the gaps between said plural transparent fine spheres; and

a step of removing said colored material located at at least light-transmissible positions of the opposite side to said transparent base.

2. The planar type lens manufacturing method as claimed in

claim 1

, wherein carbon toner is used as said colored material.

3. The planar type lens manufacturing method as claimed in

claim 2

, wherein said carbon toner using cellulose acetate as binder is used.

4. The planar type lens manufacturing method as claimed in

claim 2

, wherein said carbon toner has a particle diameter of 0.05 to 15 μ

m.

5. The planar type lens manufacturing method as claimed in

claim 4

, wherein in said step of supplying said colored material, after carbon toner having a relatively large particle size is supplied, carbon toner having a small particle size is supplied between the carbon toner having the relatively large particle size.

6. The planar type lens manufacturing method as claimed in

claim 2

, wherein in said step of supplying said colored material, after said carbon toner is scattered, said carbon toner is buried in the gaps between said plural transparent fine spheres by a rotating brush.

7. The planar tape lens manufacturing method as claimed in

claim 2

, wherein in said step of supplying said colored material, after said carbon toner is scattered, said carbon toner is buried in the gaps between said plural transparent fine spheres by a pressure roller.

8. The planar type lens manufacturing method as claimed in

claim 2

, wherein in said step of supplying said colored material, said carbon toner is sprayed by an air jet nozzle to be buried into the gaps between said plural transparent fine spheres.

9. The planar type lens manufacturing method as claimed in

claim 2

, wherein in said step of removing said colored material, said colored material is removed by making said carbon toner adhere to extra fine fiber cloth.

10. The planar type lens manufacturing method as in

claim 2

, wherein in said step of removing said material, said colored material is removed by making said carbon toner adhere to an adhesive roll.

11. The planar type lens manufacturing method as claimed in

claim 2

, wherein in said step of removing said colored material, said colored material is removed by making said carbon toner adhere to an adhesive plane of an adhesive tape.

12. The planar type lens manufacturing method as claimed in

claim 1

, further comprising a step of laminating a second transparent base through a second transparent sticky layer on said plural transparent fine spheres after said step of removing said colored material.