Greenblum & Bernstein, P.L.C.
Fresnel lens, Fresnel lens unit, and head-up display
The present invention provides a Fresnel lens that can reduce generation of concentric stray light. The Fresnel lens includes a sawtooth corrugated face that is formed by alternately disposing a first face inclined relative to optical axis A and a second face substantially parallel to optical axis A, and a light shielding mask is formed at a position corresponding to the second face.
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
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Hiroaki Satoshi Kosuke Ken?ichi Masahito Toshiya
Okayama Kuzuhara Kubota Kasazumi Ogata Mori