Title:
PROJECTION LENS
Document Type and Number:
WIPO Patent Application WO2002050595
Kind Code:
A3
Abstract:
The invention relates to a projection lens that is composed of nine lenses with bilateral air-glass surfaces. The aim of the invention is to provide a lens or a series of lenses that guarantee the most effective light distribution across the entire object field while offering a projection quality that is greater than or equal to the projection quality of the of known technical solutions while creating technologically favorable glasses. To this end, the projection lens according to the invention meets the following requirements in their entirety: u >/= 12.8 DEG , 100 mm = LEP = 400 mm, sigma RBa >/= 1 DEG , sigma RBi = -14 DEG , with u being the orifice angle (2u total angle) at the illumination side, LEP being the distance of the entrance pupil (illumination side ) from the object plane (position in the direction of projection from the reference point of the object plane is a positive value), sigma RBa being the angular tilt of the beam with respect to the optical axis in the object space between the object and the first lens surface of the lens that delimits the bundle for the field edge (outer field point in the object) towards the exterior (away from the optical axis, axis-remote), and sigma RBi being the angular tilt of the beam with respect to the optical axis in the object space between the object and the first lens surface of the lens that delimits the bundle for the field edge (outer field point in the object) towards the interior (towards the optical axis, axis-close). The angles sigma RBa and sigma RBi are positive if the corresponding beams intersect the optical axis in a point that lies in the opposite direction of projection when seen from the object, and they are negative if they intersect the optical axis in a point that lies in the direction of projection when seen from the object. The lenses are positioned in the following sequence, starting from the image (blow-up side) towards the object (reduction and illumination side): a first negative, meniscus-shaped lens (1), with the convex surface on the image side, a second negative, meniscus-shaped lens (2), with the convex surface on the image side, a third positive lens (3), with a convex surface on the object side, a fourth positive, meniscus-shaped lens (4), with a convex surface on the image side, a fifth negative lens (5), with a concave surface on the object side, a sixth biconvex lens (6), a seventh biconcave lens (7), an eighth positive lens (8), with a convex surface on the object side, and a ninth positive lens (9), with a convex surface on the image side.
Inventors:
REINECKE WOLFGANG (DE)
LINGE HORST (DE)
LINGE HORST (DE)
Application Number:
PCT/EP2001/014627
Publication Date:
March 27, 2003
Filing Date:
December 12, 2001
Export Citation:
Assignee:
OPTISCHE SYSTEME GOETTINGEN IS (DE)
WOLFGANG REINECKE INGENIEURBUE (DE)
REINECKE WOLFGANG (DE)
LINGE HORST (DE)
WOLFGANG REINECKE INGENIEURBUE (DE)
REINECKE WOLFGANG (DE)
LINGE HORST (DE)
International Classes:
G02B9/64; G02B11/34; G02B13/04; G02B27/18; (IPC1-7): G02B9/64; G02B11/34; G02B13/04
Foreign References:
EP1134606A1 | 2001-09-19 | |||
DE4212067A1 | 1993-10-14 | |||
US4070098A | 1978-01-24 | |||
US3938883A | 1976-02-17 | |||
US4025169A | 1977-05-24 | |||
US4566764A | 1986-01-28 | |||
US6160671A | 2000-12-12 | |||
US5973848A | 1999-10-26 | |||
EP0548529A1 | 1993-06-30 |
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