03 AQ 04 Precision Aspheric Lenses
Aspheric surfaces allow single elements to achieve near-diffraction-limited performance even at large apertures, avoiding the complexity, bulk and reflection losses of multiple-element designs such as microscope objectives. However, until recently, it has not been possible to produce them economically with good figure.
Precision moulding technology, and bulk demand for laser-diode collimators, allow us to offer this range at a very reasonable cost. They are also ideal for laser focusing and beam expanders and for fibre input and output. Although designed for specific laser wavelengths, their performance will be practically as good over most of the visible and NIR range. The glass lenses have a single-layer AR coating on high-index flint glass giving over 97% transmittance at the design wavelength.The plastic lenses offer high precision at a very low cost. Some items (see diagrams) have integral mounting rings.
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