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US 12,748,307 B2Granted
Holographic projection device
AssigneeCarl Zeiss Jena GmbH
InventorsYi Zhong, Siemen Kuehl, Marc Junghans, Roman Kleindienst, Christoph Erler
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AssigneeCarl Zeiss Jena GmbH
InventorsYi Zhong, Siemen Kuehl, Marc Junghans, Roman Kleindienst, Christoph Erler
Estimating the term…
A holographic projection device includes a first volume hologram that deflects light from a useful light source to generate an image. Light which does not originate from the useful light source and strikes the first volume hologram at a predetermined solid angle deflects such that it is perceptible as unwanted interfering light. The projection device also includes a holographic filter which deflects the light which does not originate from the useful light source and would strike the first volume hologram at the predetermined solid angle, before the light strikes the first volume hologram, such that it is not perceptible as unwanted interfering light, and/or deflects the light which does not originate from the useful light source and strikes the first volume hologram at the predetermined solid angle, after the deflection by the first volume hologram, such that it is not perceptible as unwanted interfering light.
A holographic projection device for generating an image that a viewer can perceive when their eye is positioned in a predetermined viewing region and they look at the projection device at a predetermined viewing angle, the holographic projection device comprising:
Dependencies are inferred from the claim text.