(0)G02B:0/5:
IPC6
SECTION G - PHYSICS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
G02B
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G 02

 OPTICS (making optical elements or apparatus B 24 B, B 29 D 11/00, C 03, or other appropriate subclasses or classes; materials per se, see the relevant places, e.g. C 03 B, C 03 C)
 

Note
 

In this class, the following expression is used with the meaning indicated:
 

-

 "optical" applies not only to visible light but also to ultra-violet or infra-red radiations. [4]

G 02 B

 OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS (G 02 F takes precedence; measuring-instruments, see the relevant subclass of class G 01, e.g. optical rangefinders G 01 C; testing of optical elements, systems, or apparatus G 01 M 11/00; spectacles G 02 C; apparatus or arrangements for taking photographs or for projecting or viewing them G 03 B; sound lenses G 10 K 11/30; electron and ion "optics" H 01 J; X-ray "optics" H 01 J, H 05 G 1/00; optical elements structurally combined with electric discharge tubes H 01 J 5/16, H 01 J 29/89, H 01 J 37/22; microwave "optics" H 01 Q; combination of optical elements with television receivers H 04 N 5/72; optical systems or arrangements in colour television systems H 04 N 9/00; heating arrangements specially adapted for transparent or reflecting areas H 05 B 3/84)
 

Note
 

In this subclass, the following terms or expressions are used with the meanings indicated:
 

-

 "simple lens or prism" means a single lens or prism;
 

-

 "compound lens or prism" means an optical member, the constituents of which either are close together without air-space or (except in group G 02 B 11/00) are "in broken contact", i.e. with the air-space between the constituents having no essential optical influence;
 

-

 "objective" means a lens or an optical system designed to produce a real image of a real object;
 

-

 "eyepiece" means a lens or an optical system designed to produce a virtual image for viewing by the eye or by another optical system;
 

-

 "front" or "rear" is determined by looking from the more distant conjugate.

 

 

 
 

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/ 00 Optical elements characterised by the material of which they are made (compositions of optical glasses C 03 C 3/00); Optical coatings for optical elements

1
/ 02 • made of crystals, e.g. rock-salt, semiconductors (G 02 B 1/08 takes precedence)  

1
/ 04 • made of organic materials, e.g. plastics (G 02 B 1/08 takes precedence)  

1
/ 06 • made of fluids in transparent cells  

1
/ 08 • made of polarising materials  

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/ 10 • Optical coatings produced by application to, or surface treatment of, optical elements (G 02 B 1/08 takes precedence)  

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/ 11 • • Anti-reflection coatings [6]  

1
/ 12 • • by surface treatment, e.g. by irradiation  
 

 3
/ 00 Simple or compound lenses (artificial eyes A 61 F 2/14; spectacle lenses or contact lenses for the eyes G 02 C; watch or clock glasses G 04 B 39/00)

3
/ 02 • with non-spherical faces (G 02 B 3/10 takes precedence)  

3
/ 04 • • with continuous faces that are rotationally symmetrical but deviate from a true sphere  

3
/ 06 • • with cylindrical or toric faces  

3
/ 08 • • with discontinuous faces, e.g. Fresnel lens  

3
/ 10 • Bifocal lenses; Multifocal lenses  

3
/ 12 • Fluid-filled or evacuated lenses  

3
/ 14 • • of variable focal length  
 

 5
/ 00 Optical elements other than lenses (light guides G 02 B 6/00 ; optical logic elements G 02 F 3/00) [4]

5
/ 02 • Diffusing elements; Afocal elements  

5
/ 04 • Prisms  

5
/ 06 • • Fluid-filled or evacuated prisms  

5
/ 08 • Mirrors  

5
/ 09 • • Multifaceted or polygonal mirrors [6]  

5
/ 10 • • with curved faces  

5
/ 12 • Reflex reflectors  

5
/ 122 • • cube corner, trihedral or triple reflector type [2]  

5
/ 124 • • • plural reflecting elements forming part of a unitary plate or sheet [2]  

5
/ 126 • • including curved refracting surface [2]  

5
/ 128 • • • transparent spheres being embedded in matrix [2]  

5
/ 13 • • • plural curved refracting elements forming part of a unitary body [2]  

5
/ 132 • • • with individual reflector mounting means [2]  

5
/ 134 • • • • including a threaded mounting member [2]  

5
/ 136 • • plural reflecting elements forming part of a unitary body (G 02 B 5/124 takes precedence) [2]  

5
/ 18 • Diffracting gratings  

5
/ 20 • Filters (polarising elements G 02 B 5/30; filters specially adapted for photographic purposes G 03 B 11/00)  

5
/ 22 • • Absorbing filters  

5
/ 23 • • • Photochromic filters [2]  

5
/ 24 • • • Liquid filters (G 02 B 5/23 takes precedence) [2]  

5
/ 26 • • Reflecting filters (G 02 B 5/28 takes precedence)  

5
/ 28 • • Interference filters  

5
/ 30 • Polarising elements (light-modulating devices G 02 F 1/00)  

5
/ 32 • Holograms used as optical elements (processes or apparatus for producing holograms G 03 H) [2]  
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