1988-01-29
1990-02-27
Bovernick, Rodney B.
350 372, G02B 2610, G02B 532
Patent
active
049040340
ABSTRACT:
A scanner including a source of coherent light, a radial hologon, a f.theta. lens and a target. Between the light source and the hologon there are means for forming light from the source into a collimated beam having an oblong cross-sectional shape and for directing the beam onto the hologon at a predetermined incident angle and with the long axis of the oblong cross-sectional shape of the beam radial of the axis of rotation of the hologon. Prismatic means are provided between the hologon and the lens means for so modifying the cross-sectional shape of the beam that the spot at the target station has a selected shape and orientation. This allows the shape, orientation and size of the beam on the hologon to be optimum for duty cycle of the hologon and for spot size on the target. The prismatic means allows the spot shape and orientation on target to be optimized. The prismatic means tends to introduce undesirable bow into the scan line, therefore the wavelength of the light and the grating factor (n .lambda.)/d of the hologon are selected to produce an approximately equivalent opposite bow.
REFERENCES:
patent: 2436148 (1948-02-01), Maurer, Jr.
patent: 2613127 (1952-10-01), Geiser
patent: 3750189 (1973-07-01), Fleischer
patent: 3758783 (1973-09-01), Sick et al.
patent: 3877777 (1975-04-01), Glenn, Jr.
patent: 4016504 (1977-04-01), Klauminzer
patent: 4081760 (1978-03-01), Berg
patent: 4084881 (1978-04-01), Hirabayashi et al.
patent: 4097818 (1978-06-01), Manoukian et al.
patent: 4121883 (1978-10-01), Goshima et al.
patent: 4127828 (1978-11-01), Klauminzer
patent: 4176907 (1979-12-01), Matsumoto et al.
patent: 4190809 (1980-02-01), Goodman et al.
patent: 4243293 (1981-01-01), Kramer
patent: 4289371 (1981-09-01), Kramer
patent: 4337994 (1982-07-01), Brasier
patent: 4410237 (1983-10-01), Veldkamp
patent: 4426707 (1984-01-01), Martin et al.
patent: 4428643 (1984-01-01), Kay
patent: 4470659 (1984-09-01), Funato
patent: 4478480 (1984-10-01), Doggett
patent: 4487472 (1984-12-01), Asano
patent: 4573758 (1986-03-01), Hecker et al.
patent: 4580879 (1986-04-01), Wilson
patent: 4623791 (1986-11-01), Kaneko et al.
patent: 4626062 (1986-12-01), Ishikawa
"Specifying Laser Diode Optics", Laser Focus/Electro Optics, pp. 44-55; Mar. 1984, David Kuntz.
Narayan Badhri
Roddy James E.
Stark Richard A.
Thompson Dennis A.
Bovernick Rodney B.
Lerner Martin
LandOfFree
Scanning apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scanning apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-168783