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Optical objectives with means for varying the magnification

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Industry

  • CPC
  • G02B15/00
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Parent Industries

GPHYSICS G02Optics G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS

Current Industry

G02B15/00Optical objectives with means for varying the magnification

Sub Industries

G02B15/02by changing, adding, or subtracting a part of the objective G02B15/04by changing a part G02B15/06by changing the front part G02B15/08by changing the rear part G02B15/10by adding a part G02B15/12by adding telescopic attachments G02B15/14by 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 G02B15/15compensation by means of only one movement or by means of only linearly related movements G02B15/155Zoom lenses arranged symmetrically around a central plane G02B15/16with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group G02B15/161Zoom lenses having only two lenses or lens groups G02B15/163having 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 G02B15/167having an additional fixed front lens or group of lenses G02B15/17arranged +-- G02B15/173arranged +-+ G02B15/177having a negative front lens or group of lenses G02B15/20having an additional movable lens or lens group for varying the objective focal length G02B15/22with movable lens means specially adapted for focusing at close distances G02B15/24having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group G02B15/26arranged +-- G02B15/28arranged +-+
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