Star field projection apparatus
AssigneeBliss Holdings, LLC
InventorRandy E. Johnson
Life of this patent
Estimating the term…
Abstract
A projection apparatus for generating a moving star field and a cloud-like effect comprises a means for generating a cloud-like effect using at least one non-coherent light source, a means for generating a moving star field using at least one coherent light source and a means for regulating and supplying electric power. The means for generating cloud-like effect using at least one non-coherent light source comprises at least one pair of condenser lenses and an interferential filter wheel rotated by a motor, disposed between at least one pair of condenser lenses. The means for generating the moving star field using a coherent light source comprises a grating wheel rotated by a motor and a diffractive optical element disposed between the at least one coherent light source and the grating wheel.
Claims17
A projection apparatus for generating a moving star field and a moving cloud-like effect, comprising:
- a. an arrangement configured to generate a moving cloud-like effect using at least one non-coherent light source, the arrangement comprising at least one pair of condenser lenses, an interferential filter wheel and a motor for rotating the interferential filter wheel, the interferential wheel being disposed between the at least one pair of condenser lenses;
- b. an arrangement configured to generate a moving star field using at least one coherent light source;
- and
- c. a powder supply.
Dependencies are inferred from the claim text.