VELOCITY DETECTING DEVICE AND MULTI-COLOR IMAGE FORMING APPARATUS
First Claim
1. A velocity detecting device that detects velocity and velocity fluctuation of a moving member, the velocity detecting device comprising:
- an image-pattern acquiring unit thatincludes a laser light source and an area sensor that acquires a one-dimensional or a two-dimensional image,provides a lens between the moving member and the area sensor,irradiates a beam emitted from the laser light source to the moving member to make a scattering light of the moving member scattered from the moving member, andacquires an image pattern on the area sensor derived from the scattering light by using the lens at a predetermined time interval in association with movement of the moving member; and
a velocity calculating unit that calculates velocity of the moving member by computing a plurality of the image patterns acquired by the image-pattern acquiring unit, whereinthe lens is a reduced optical system that projects a reduced object onto the area sensor.
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Accused Products
Abstract
A velocity detecting device includes an image-pattern acquiring unit that includes a laser light source and an area sensor that acquires a one-dimensional or a two-dimensional image. The image-pattern acquiring unit includes a lens between a moving member and the area sensor, irradiates a beam emitted from the laser light source to the moving member to make a scattering light of the moving member scattered from the moving member on the area sensor by using the lens, and acquires an image pattern at a predetermined time interval in association with movement of the moving member. A velocity calculating unit calculates the velocity of the moving member by computing the image pattern acquired by the image-pattern acquiring unit. The lens is a reduced optical system that projects a reduced object onto the area sensor.
81 Citations
20 Claims
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1. A velocity detecting device that detects velocity and velocity fluctuation of a moving member, the velocity detecting device comprising:
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an image-pattern acquiring unit that includes a laser light source and an area sensor that acquires a one-dimensional or a two-dimensional image, provides a lens between the moving member and the area sensor, irradiates a beam emitted from the laser light source to the moving member to make a scattering light of the moving member scattered from the moving member, and acquires an image pattern on the area sensor derived from the scattering light by using the lens at a predetermined time interval in association with movement of the moving member; and a velocity calculating unit that calculates velocity of the moving member by computing a plurality of the image patterns acquired by the image-pattern acquiring unit, wherein the lens is a reduced optical system that projects a reduced object onto the area sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A velocity detecting device that detects velocity and velocity fluctuation of a moving member, the velocity detecting device comprising:
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an image-pattern acquiring unit that includes a laser light source and an area sensor that can acquire a one-dimensional or a two-dimensional image, provides a lens between the moving member and the area sensor, irradiates a beam emitted from the laser light source to the moving member to make a scattering light of the moving member scattered from the moving member, and acquires an image pattern on the area sensor derived from the scattering light by using the lens at a predetermined time interval in association with movement of the moving member; and a storage unit that previously stores therein image patterns corresponding to a plurality of positions on the moving member, wherein the moving member is an endless moving member, and the velocity of the moving member is detected by computing the image pattern stored in the storage unit and the image pattern acquired by the image-pattern acquiring unit. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification