TREA

having a negative front lens or group of lenses

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Industry

  • CPC
  • G02B15/177
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Parent Industries

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

Current Industry

G02B15/177having a negative front lens or group of lenses
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