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1 What is a retarder? Retarder is an electromagnetic device installed on the transmission shaft of the vehicle.

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Essentially, visible light passes through glass, but glass acts like a mirror for infrared wavelengths (which is why thermal imaging camera lenses are often ...

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•  3M™ Press-On™ Optics, also known as Fresnel Prisms, and Press-On Aspherics, provide a system for creating      prismatic and spherical corrections in a cost effective and temporary manner.•  3M™ Press-On™ Optics offer the eye care professional and the patient several benefits:•  A simple, therapeutic, inexpensive, way to correct several visual disorders.•  Provide an immediate correction.•  They are more comfortable, more cosmetically appealing treatment for strabismus and diplopia than conventional prisms.•  They add NO noticeable weight or thickness to the spectacle.•  Press-on prism material is flexible static vinyl which can easily be cut to shape with scissors to determine the acceptance of  a proposed corrective prescription.•  Adheres with just water to existing lenses, yet it can be easily repositioned.•  Apply a Press-On sphere or prism to the back surface of one or both lenses of the patient`s eyeglasses with just water.•  It can be applied to the entire lens or to any region of the lens.•  A full range of seventeen powers from 1.00 to 40.00 prism diopters allows you to broaden therapeutic uses and provides additional treatment options in your practice.Made of polyvinyl chloride1mm thick63.5 mm diameter

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There is an inverse relationship between distance and light intensity - as the distance increases, light intensity decreases. This is because ...

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Features of nonlinear BBO crystal includes wide transparency and phase matching ranges, large non-linear coefficient, high damage threshold and excellent ...

For a full refund with no deduction for return shipping, you can return the item for any reason in new and unused condition. Learn more about free returns. How ...

CCD. Charge coupled devices, or CCDs, are sensitive detectors of photons that can be used in telescopes instead of film or photographic plates to produce images ...

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