LAMINATED GLASS LENS FOR SPECTACLES

• US 20120287395A1
• Filed: 02/09/2011
• Published: 11/15/2012
• Est. Priority Date: 02/25/2010
• Status: Active Grant

• Current Assignee: Talex Optical Co., Ltd.
• Original Assignee: Talex Optical Co., Ltd.
• Inventors: Tamura, Kanichi, Mitsuuchi, Shoichi, Wada, Kenzo
• Granted Patent: US 9,017,820 B2
• Time in Patent Office: Days
• US Class Current: 351/49
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10458 Polarization selective transmission
• CPC Class Codes: B32B 17/10651 comprising colorants, e.g. dyes or pigments
• CPC Class Codes: B32B 17/10706 being photo-polymerized
• CPC Class Codes: C03C 27/10 with the aid of adhesive specially adapted for that purpose
• CPC Class Codes: C09B 47/00 Porphines; Azaporphines non-dyeing compounds C07D487/22
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02C 2202/16 Laminated or compound lenses
• CPC Class Codes: G02C 7/022 Ophthalmic lenses having special refractive features achieved by special materials or material structures G02C7/049 takes precedence
• CPC Class Codes: G02C 7/10 Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
• CPC Class Codes: G02C 7/108 Colouring materials
• CPC Class Codes: G02C 7/12 Polarisers
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

In order for the discolored laminated glass lens for spectacles to have excellent glare-prevention characteristics, a tetraazaporphyrin compound is combined at a required concentration with an extremely thin adhesive agent layer in a manner so that unevenness of color does not arise, and of the light-absorbing ability expected for a laminated lens for spectacles. There is sufficient shielding of light in the vicinity of the 585 nm wavelength. In the laminated glass lens for spectacles, two glass lens substrates (2 and 3) (each about 1 mm thick) are bonded together with an adhesive agent layer (1) therebetween. A liquid substance of a solventless adhesive to which a pigment containing a tetraazaporphyrin compound is added together with an organic solvent is dropped onto the glass lens substrate (2) in the form of a droplet (1a; shown by phantom line in FIG. 1), and the other glass lens substrate (3) is pressed against the glass lens substrate (2) with a relatively light load to spread the droplet (1a) into a layer having a thickness of 5 to 150 micrometers, and allowing the thus spread layer to be cured as the adhesive layer (1).

Claims

1. A laminated glass lens for spectacles, comprising a plurality of glass lens substrates laminated one on another through an adhesive layer, and containing a pigment so that the lens has a main absorption peak of visible light spectral transmission at wavelengths of 565 to 605 nm,

characterized in that the adhesive layer has a thickness of 5 to 150 μ

m and comprises a solventless adhesive to which a pigment containing a tetraazaporphyrin compound is added together with an organic solvent.

2. The laminated glass lens for spectacles of claim 1, wherein the content of the organic solvent in the adhesive layer is 2% by weight or less.

3. The laminated glass lens for spectacles of claim 1, wherein the pigment further comprises a neodymium pigment compound.

4. The laminated glass lens for spectacles of claim 1, further comprising a polarizing film layer.

5. The laminated glass lens for spectacles of claim 4, wherein the polarizing film layer comprises a polyvinyl alcohol, and iodine polarizing agent.

8. The laminated glass lens for spectacles of claim 2, wherein the pigment further comprises a neodymium pigment compound.

9. The laminated glass lens for spectacles of claim 2, further comprising a polarizing film layer.

10. The laminated glass lens for spectacles of claim 3, further comprising a polarizing film layer.

6. A method of producing a laminated glass lens for spectacles comprising dissolving a pigment containing a tetraazaporphyrin compound into an organic solvent to obtain a pigment solution, adding the pigment solution to a solventless adhesive to obtain a pigment-containing adhesive solution having a viscosity of 100 to 2000 mPa·

s, applying the pigment-containing adhesive solution to a first glass lens substrate, and laminating a second glass lens substrate on the first glass lens substrate with the adhesive solution disposed therebetween such that the adhesive solution is formed into an adhesive layer having a thickness of 5 to 150 μ

m and bonding the first and second glass lens substrates together.

7. A method of producing a laminated glass lens for spectacles comprising dissolving a pigment containing a tetraazaporphyrin compound into an organic solvent to obtain a pigment solution, adding the pigment solution to a solventless adhesive to obtain a pigment-containing adhesive solution having a viscosity of 100 to 2000 mPa·

s, applying the pigment-containing adhesive solution to first and second glass lens substrate and/or a polarizing film, and laminating the second glass lens substrate on the first glass lens substrate with the polarizing film disposed therebetween such that the adhesive solution is formed into adhesive layers each having a thickness of 5 to 150 μ

m and bonding the first and second glass lens substrates together through the polarizing film.