Projection system
AssigneesSun Yang Optics Development Co., Ltd., Shenzhen Anhua Optoelectronics Technology Co., Ltd.
InventorsSheng-Che Wu, Yu-Hung Chou, Wei-Hao Huang
Life of this patent
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Abstract
A projection system includes a long-focus lens that is able to generate an image independently with a focal length between 70-300 mm, a short-focus lens that is able to generate an image independently with a focal length between 3-8 mm and shares an optical axis with the long-focus lens and at least one reflector to reflect the optical axis for direction change. When the long-focus lens generates an image, the short-focus lens then generates the image to a pre-determined position thereby.
Claims11
A projection system, comprising:
- a long-focus lens able to generate an image and having a focal length ranging from 70 to 300 mm, said long-focus lens having an f-number between 1.7-2.0;
- a short-focus lens able to generate an image and having a focal length ranging from 3 to 8 mm, said short-focus lens sharing an optical axis with said long-focus lens;
- and
- at least one reflector to change a direction of said optical axis, thereby said long-focus lens generating an image and then said short-focus lens generating said image to a pre-determined position.
A projection system, comprising:
- a long-focus lens able to generate an image and having a focal length ranging from 70 to 300 mm, said long-focus lens has an optical magnification between 1.5-2.5;
- a short-focus lens able to generate an image and having a focal length ranging from 3 to 8 mm, said short-focus lens sharing an optical axis with said long-focus lens;
- and
- at least one reflector to change a direction of said optical axis, thereby said long-focus lens generating an image and then said short-focus lens generating said image to a pre-determined position.
A projection system, comprising:
- a long-focus lens able to generate an image and having a focal length ranging from 70 to 300 mm, said long-focus lens including an aperture stop, at least a first doublet and at least a second doublet, said at least one first and one second doublet being disposed at a rear side of said long-focus lens;
- a short-focus lens able to generate an image and having a focal length ranging from 3 to 8 mm, said short-focus lens sharing an optical axis with said long-focus lens;
- and
- at least one reflector to change a direction of said optical axis, thereby said long-focus lens generating an image and then said short-focus lens generating said image to a pre-determined position.
Dependencies are inferred from the claim text.