Optical cross talk mitigation for optical device having disrupting features formed on a shield
AssigneeMicrosoft Technology Licensing, LLC
InventorsRaymond Kirk Price, Erica Lee Towle, Ravi Kiran Nalla
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Abstract
A system and method are disclosed for reducing light from one or more light sources from entering into a light sensor by reflection off of a visor and/or waveguiding within the visor. In embodiments, a shroud may be provided around the light sensor to block light reflected off of the visor from entering the light sensor. In embodiments, pattern of one or more grooves may be formed in the visor to block light waveguided within the visor from entering the light sensor.
Claims20
A system for reducing an amount of light transmitted from a light source of an imaging device to a light sensor of the imaging device by a shield, the light sensor being adjacent to the shield, the system comprising:
- optical disrupting features formed in or on a surface of the shield;
- and
- material, opaque to wavelengths emitted by the light source, used in conjunction with the optical disrupting features, the optical disrupting features and opaque material blocking light from the light source from entering the light sensor via waveguiding through the shield.
A system for reducing an amount of light transmitted from a light source of an imaging device to a light sensor of the imaging device by a visor, the light source and light sensor being adjacent to the visor, the system comprising:
- a pattern of one or more grooves formed in a first area of the visor into a surface of the visor;
- and
- material, opaque to wavelengths emitted by the light source, the material at least partially filling the pattern of one or more grooves, and the material applied to a second area of the visor on the surface of the visor, the pattern of one or more grooves and opaque material blocking light from the light source from entering the light sensor via waveguiding through the visor.
A method of forming an imaging device for a head mounted display device, the head mounted display device comprising a visor, and the display device comprising a light source and light sensor positioned behind the visor when worn by a user, the method comprising:
- (a) forming optical disrupting features on or in a surface of the visor at least partially encircling an area of the visor adjacent to the light sensor;
- and
- (b) applying a material, opaque to wavelengths emitted by the light source, to the optical disrupting features, the optical disrupting features and opaque material blocking light from the light source from entering the light sensor via waveguiding through the visor.
Dependencies are inferred from the claim text.