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1. A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.
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2. Main product:F600 lens for large size engineering duplicate, F300 lens for writing projector, lens for engrave machine, CCD lens and various protecting goggles from laser radiation.
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3. Main product:F600 lens for large size engineering duplicate, F300 lens for writing projector, lens for engrave machine, CCD lens and various protecting goggles from laser radiation.
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4. Cylindrical lens method: cylindrical lens can be seen as being a lot of convex lens piece-by-side components of lens plate that has divided like.
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5. The straight line type lens barrel is sleeved in the driving lens barrel in parallel mobile mode relative to the axle center of the fixed lens barrel.
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collecting lens collector lens condensing lens projection lens
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