| 摘要 |
Projection lenses for use with pixelized panels (PP) are provided. The projection lenses have first and second lens units (U1,U2), each of which can contain just two optical components, e.g., LM and LP1 for the first lens unit and L DB and LP2 for the second lens unit. The second lens unit can contain a hybrid component (e.g., LP2) which comprises a glass base to which is attached a layer (M) of a formable material which has an external surface which is aspheric. The use of a hybrid component allows the projection lens to have reduced thermal drift, a reduced optical component count, and a short barrel length. The first lens unit can include an additional negative lens element LN to improve the moldability of LM, and the second lens unit can include a molded glass asphere rather than a hybrid component.
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