TREA

having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group

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Industry

  • CPC
  • G02B15/24
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Parent Industries

GPHYSICS G02Optics G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS G02B15/00Optical objectives with means for varying the magnification

Current Industry

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
Industries