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Optics and elements characterised by the material of which they are made
Optical objectives specially designed for the purposes specified below
Optical objectives with means for varying the magnification
Systems with reflecting surfaces, with or without refracting elements
Telescopes, e.g. binoculars
Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating, modulating
Simple or compound lenses
Optical elements other than lenses
Optical objectives characterised both by the number of the components and their arrangements according to their sign
Assemblies of lenses with bridges or browbars
Non-optical adjuncts
Special supporting arrangement for lens assemblies or monocles
Constructions of non-optical parts
Optical parts
Attaching auxiliary optical parts
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating
Demodulating light
Optical logic elements


Film-strip handling
Filters or other obturators specially adapted for photographic purposes
Special procedures for taking photographs
Details of cameras or camera bodies
Projectors or projection-type viewers
Devices for changing pictures in viewing apparatus or projectors
Photographic printing apparatus
Associated working of cameras or projectors with sound-recording or -reproducing means
Stereoscopic photography
Panoramic or wide-screen photography
Obtaining records using waves other than optical waves
Adjustment of optical system relative to image or object surface other than for focusing
Control of exposure by setting shutters, diaphragms, or filters separately or conjointly
Exposure-making shutters
Photosensitive materials
Auxiliary processes in photography
Packages of films for inserting into cameras, e.g. roll-films, film-packs
Photographic processes or agents therefor
Multicolour photographic processes or agents therefor
Diffusion transfer processes or agents therefor
Apparatus for processing exposed photographic materials; Accessories therefor
Preparation of originals for the photomechanical production of textured or patterned surfaces
Colour separation
Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfaces
Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
Electrographic processes using a charge pattern
Apparatus for electrographic processes using a charge pattern
Arrangements not provided for by groups G03G 13/00-G03G 19/00, e.g. cleaning, elimination of residual charge
Recording-members for original recording by exposure e.g. to light, to heat, to electrons
Selection of materials for use in image-receiving members
Holographic processes or apparatus