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US 7,002,619 B1Granted
Method and apparatus for presenting stereoscopic images
AssigneeIMAX Corporation
InventorsDavid M. M. Dean, Paul D. Panabaker, Anton L. Baljet
Life of this patent
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Abstract
Systems including projection mechanisms, screens, and eyeglasses are detailed. The systems significantly reduce perceptible ghosting even when high contrast images (such as dark figures against a white background) are projected.
Claims10
A system for presenting stereoscopic images for viewing by a person having left and right eyes, comprising:
- a) means, comprising at least one projector, for projecting (i) a first series of images intended for viewing by the left eye of the person and (ii) a second series of images intended for viewing by the right eye of the person;
- b) a screen onto which the first and second series of images are projected;
- c) means, comprising a first linear polarizing filter (i) having a first axis of polarization and (ii) interposed between the at least one projector and the screen, for polarizing the first series of images;
- d) means, comprising a second linear polarizing filter (i) having a second axis of polarization differing substantially from the first axis of polarization and (ii) interposed between the at least one projector and the screen, for polarizing the second series of images;
- and
- e) eyeglasses for wearing by the person and comprising (i) a first lens system associated with the left eye of the person and (ii) a second lens system associated with the right eye of the person, the first lens system comprising:
- A) a third linear polarizing filter having a third axis of polarization at least substantially parallel to the first axis of polarization;
- B) a fourth linear polarizing filter (1) interposed between the third linear polarizing filter and the left eye of the person when the eyeglasses are in use and (2) having a fourth axis of polarization differing substantially from the first and third axes of polarization;
- and
- C) a first cell interposed between the third and fourth linear polarizing filters;
- and
- the second lens system comprising:
- A) a fifth linear polarizing filter having a fifth axis of polarization at least substantially parallel to the second axis of polarization;
- B) a sixth linear polarizing filter (1) interposed between the fifth linear polarizing filter and the right eye of the person when the eyeglasses are in use and (2) having a sixth axis of polarization differing substantially from the second and fifth axes of polarization;
- and
- C) a second cell interposed between the fifth and sixth linear polarizing filters.
13 more elements
A system for presenting stereoscopic images for viewing by a person having left and right eyes, comprising:
- a) means, comprising at least one projector, for projecting (i) a first series of images intended for viewing by the left eye of the person and (ii) a second series of images intended for viewing by the right eye of the person;
- b) a screen onto which the first and second series of images are projected, with the first series of images having been polarized with a first state of polarization, such polarization occurring between the at least one projector and the screen, and the second series of images having been polarized with a second state of polarization differing substantially from the first state of polarization, such polarization also occurring between the at least one projector and the screen;
- and
- c) eyeglasses for wearing by the person and comprising (i) a first lens system associated with the left eye of the person and (ii) a second lens system associated with the right eye of the person, the first lens system comprising:
- A) a first polarizing means having a third state of polarization at least substantially the same as the first state of polarization;
- B) a second polarizing means (1) interposed between the first polarizing means and the left eye of the person when the eyeglasses are in use and (2) having a fourth state of polarization differing substantially from the first and third states of polarization;
- and
- C) a first cell interposed between the first and second polarizing means;
- and
- the second lens system comprising:
- A) a third polarizing means having a fifth state of polarization at least substantially the same as the second state of polarization;
- B) a fourth polarizing means (1) interposed between the third polarizing means and the right eye of the person when the eyeglasses are in use and (2) having a sixth state of polarization differing substantially from the second and fifth states of polarization;
- and
- C) a second cell interposed between the third and fourth polarizing means.
11 more elements
Dependencies are inferred from the claim text.