PRESENCE DISPLAY DEVICE

PRESENCE DISPLAY DEVICE

PROBLEM TO BE SOLVED: To display a video with much presence by using an infinity display system by setting a distance between a video display means and an image- formation optical means to length approximate to the focal length of a Ferns lens constituting the image-formation optical means within th...

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Hauptverfasser: KATSURA TAKUJI, SHIMAZU MIKIO
Format: Patent
Sprache:eng
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OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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creator KATSURA TAKUJI
SHIMAZU MIKIO
description PROBLEM TO BE SOLVED: To display a video with much presence by using an infinity display system by setting a distance between a video display means and an image- formation optical means to length approximate to the focal length of a Ferns lens constituting the image-formation optical means within the focal length thereof. SOLUTION: An observer 3 views an actually taken video displayed on the video display means 1 through the Fresnel lens 2. When it is assumed that the distance between the lens 2 and the means 1 is (a) and the focal length of the lens 2 is (f), the ratio of the size X of the video on the means 1 to the size Y of the displayed video 4 is expressed as Y/X=f/(a-f). In the case of 0
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SOLUTION: An observer 3 views an actually taken video displayed on the video display means 1 through the Fresnel lens 2. When it is assumed that the distance between the lens 2 and the means 1 is (a) and the focal length of the lens 2 is (f), the ratio of the size X of the video on the means 1 to the size Y of the displayed video 4 is expressed as Y/X=f/(a-f). In the case of 0&lt;a&lt;f, a virtual image is always larger than the video on the means 1, and in the case the length (a) is made approximate to the length (f), the size Y of the video 4 becomes infinity. In fact, the length (a) is set to the value approximate to the length (f) within a range where an image is not blurred for the observer 3. 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SOLUTION: An observer 3 views an actually taken video displayed on the video display means 1 through the Fresnel lens 2. When it is assumed that the distance between the lens 2 and the means 1 is (a) and the focal length of the lens 2 is (f), the ratio of the size X of the video on the means 1 to the size Y of the displayed video 4 is expressed as Y/X=f/(a-f). In the case of 0&lt;a&lt;f, a virtual image is always larger than the video on the means 1, and in the case the length (a) is made approximate to the length (f), the size Y of the video 4 becomes infinity. In fact, the length (a) is set to the value approximate to the length (f) within a range where an image is not blurred for the observer 3. 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SOLUTION: An observer 3 views an actually taken video displayed on the video display means 1 through the Fresnel lens 2. When it is assumed that the distance between the lens 2 and the means 1 is (a) and the focal length of the lens 2 is (f), the ratio of the size X of the video on the means 1 to the size Y of the displayed video 4 is expressed as Y/X=f/(a-f). In the case of 0&lt;a&lt;f, a virtual image is always larger than the video on the means 1, and in the case the length (a) is made approximate to the length (f), the size Y of the video 4 becomes infinity. In fact, the length (a) is set to the value approximate to the length (f) within a range where an image is not blurred for the observer 3. Thus, the virtual image is formed at the position approximate to infinity and the observer 3 feels depth falsely and the video with much presence is obtained.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record>
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subjects OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
title PRESENCE DISPLAY DEVICE
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