Optical relay for compact head up display
First Claim
Patent Images
1. An optical relay for a head up display, the optical relay comprising:
- a glare trap having angularly selectivity reflecting light having an angle of incidence greater than a first angle, and transmitting light having an angle of incidence less than a second angle;
a first optic arranged to receive light reflected off the glare trap at an angle of incidence greater than the first angle, and to direct light through the glare trap at an angle of incidence less than the second angle to exit the glare trap; and
a second optic arranged to receive the light reflected off the glare trap at an angle of incidence greater than the first angle a first time, and to redirect light to the first optic that is reflected off the glare trap at an angle of incidence greater than the first angle a second time.
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Abstract
Briefly, in accordance with one or more embodiments, an optical relay for a head up display, the optical relay comprises a glare trap having angularly selectivity by being capable of reflecting light having an angle of incidence greater than a first angle, and being capable of transmitting light having an angle of incidence less than a second angle, and a first optic arranged to receive light reflected off the glare trap at an angle of incidence greater than the first angle, and to direct light through the glare trap at an angle of incidence less than the second angle to exit the glare trap.
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Citations
15 Claims
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1. An optical relay for a head up display, the optical relay comprising:
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a glare trap having angularly selectivity reflecting light having an angle of incidence greater than a first angle, and transmitting light having an angle of incidence less than a second angle; a first optic arranged to receive light reflected off the glare trap at an angle of incidence greater than the first angle, and to direct light through the glare trap at an angle of incidence less than the second angle to exit the glare trap; and a second optic arranged to receive the light reflected off the glare trap at an angle of incidence greater than the first angle a first time, and to redirect light to the first optic that is reflected off the glare trap at an angle of incidence greater than the first angle a second time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A head up display, comprising:
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a housing; a display module disposed in the housing; and optical relay disposed in the housing, the optical relay comprising; a glare trap having angularly selectivity reflecting light emitted from the display having an angle of incidence greater than a first angle, and transmitting light having an angle of incidence less than a second angle; a first optic arranged to receive light reflected off the glare trap at an angle of incidence greater than the first angle, and to direct light through the glare trap at an angle of incidence less than the second angle to exit the housing through the glare trap; and a second optic arranged to receive the light reflected off the glare trap at an angle of incidence greater than the first angle a first time, and to redirect light to the first optic that is reflected off the glare trap at an angle of incidence greater than the first angle a second time. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification