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Optical objectives with means for varying the magnification
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Industry
CPC
G02B15/00
This industry / category may be too specific. Please go to a parent level for more data
Parent Industries
G
PHYSICS
G02
Optics
G02B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
Current Industry
G02B15/00
Optical objectives with means for varying the magnification
Sub Industries
G02B15/02
by changing, adding, or subtracting a part of the objective
G02B15/04
by changing a part
G02B15/06
by changing the front part
G02B15/08
by changing the rear part
G02B15/10
by adding a part
G02B15/12
by adding telescopic attachments
G02B15/14
by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
G02B15/15
compensation by means of only one movement or by means of only linearly related movements
G02B15/155
Zoom lenses arranged symmetrically around a central plane
G02B15/16
with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
G02B15/161
Zoom lenses having only two lenses or lens groups
G02B15/163
having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
G02B15/167
having an additional fixed front lens or group of lenses
G02B15/17
arranged +--
G02B15/173
arranged +-+
G02B15/177
having a negative front lens or group of lenses
G02B15/20
having an additional movable lens or lens group for varying the objective focal length
G02B15/22
with movable lens means specially adapted for focusing at close distances
G02B15/24
having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group
G02B15/26
arranged +--
G02B15/28
arranged +-+
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