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| Number | Title | Issue Date |
| 6519097 | Gaussian lens for photography A Gaussian lens for photography includes, in order from the object side, a front lens group, a stop, and a rear lens group. The front lens group is formed of, in order from the object side, a first lens element and a second lens element, each of positive ... | 02/11/2003 |
| 6445512 | Projection television lens systems having improved modulation transfer functions Six-component projection lens systems (13) for use in CRT projection televisions (10) are provided. To provide an improved overall modulation transfer function across the field of view of the lens, the system's first lens element (L1) has an object side s... | 09/03/2002 |
| 6366412 | Lens system for reading images and image reader A lens system for reading images, consisting of six lens elements of positive, positive, negative, negative, positive and positive refractive power, respectively, in order from the object side, with a stop positioned between the third lens element and the... | 04/02/2002 |
| 6181487 | Photographic lens A photographing lens includes a front lens unit and a rear lens unit that are arranged in this order from the object side. The front lens unit comprises, in this order from the object side, a first lens element which is a positive meniscus lens having a c... | 01/30/2001 |
| 6181488 | Photographic lens A photographic lens comprising: a front lens group and a rear lens group that are arranged in order from the object side; wherein the front lens group comprises, in order from the object side, a first lens element which is a positive meniscus lens having ... | 01/30/2001 |
| 6101049 | Lens used for picture image reading and picture image reader that uses it A lens used for picture image reading that consists of six lens elements arranged as a deformed Gauss type lens, and an improved image reader which uses the lens. By establishing the lens elements to be of prescribed shapes and so that certain specified c... | 08/08/2000 |
| 5796529 | Fast photographic lens system A fast photographic lens system comprises a first lens having a positive refractive power, a convex-shaped outer face and a flat inner face; a second lens having a positive refractive power, a convex-shaped outer face and a concave-shaped inner face; a th... | 08/18/1998 |
| 5548447 | Photographic lens system A photographic lens system comprises, in order from the object end, a positive power element having a concave image end surface, an element having a concave image end surface, a negative power element, a positive power element, a meniscus element of a pos... | 08/20/1996 |
| 5517360 | Immersion microscope objective An immersion microscope objective which has a magnification of about 60, an NA of 1.4, and a reduced number of constituent lens elements and yet which is satisfactorily corrected for spherical and axial chromatic aberrations and is also superior in the fl... | 05/14/1996 |
| 5299065 | Objective with large aperture ratio An objective lens comprising, respectively from the object: a first element of a positive lens, at the object end thereof, having a convex surface; a second element of a positive meniscus lens, at the object end thereof, having a convex surface; a third e... | 03/29/1994 |
| 4993816 | Projection lens system for use in projection television A six-element projection lens system for use in a projection television is disclosed which comprises, in order from the screen side, a positive first lens, a positive meniscus second lens, a negative third lens having a stronger concave surface directed t... | 02/19/1991 |
| 4930880 | Graded refractive index lens A graded refractive index lens having refractive index distribution in the direction along the optical axis, a meniscus shape and a capability to correct aberrations, especially chromatic aberration.... | 06/05/1990 |
| 4776682 | Projection lens system with variable air space A projection lens system comprises a first group of lenses having at least one variable spacing for correcting aberration, and a second group of lenses having a variable spacing for focusing with the lens located closest to an image being fixed. It correc... | 10/11/1988 |
| 4747677 | Lens system having aberrations corrected at near distance focusing A lens system comprising a front lens group consisting of a first, second and third lens components respectively of positive meniscus lenses with the convex surfaces on the object side and a fourth lens component of a negative meniscus lens and a rear len... | 05/31/1988 |
| 4721372 | Objective lens system for an endoscope An objective lens system for an endoscope comprising a first lens component arranged as a positive meniscus lens, a second lens component arranged as a biconvex lens, a third lens component arranged as a positive cemented doublet, a fourth lens component ... | 01/26/1988 |
| 4645312 | Photographic lens system A photographic lens system having a field angle of 70° or wider and designed for use with compact cameras having a relative aperture of F/3.5 comprising a first positive meniscus lens component having a convex surface on the object side, a second positiv... | 02/24/1987 |
| 4591243 | Microscope objective A microscope objective comprising a first lens component arranged as a positive meniscus lens, a second lens component arranged as a positive lens, a third lens component having positive refractive power, a fourth lens component having positive refractive... | 05/27/1986 |
| 4563060 | Microscope objective A microscope objective comprising a first, second, third, fourth, fifth and sixth lens components wherein the first lens component is a positive meniscus lens concave toward the object side, the second lens component comprises a positive lens and has posi... | 01/07/1986 |
| 4521086 | Objective for an IC mask testing device An objective for an IC mask testing device comprising a first, second, third, fourth, fifth and sixth lens components wherein the first lens component is a positive meniscus lens, the second lens component is a biconvex lens, the third lens component is a... | 06/04/1985 |
| 4505553 | Microscope objective A microscope objective with magnification about 100× comprising six lens components wherein the third lens component is a cemented lens component consisting of three lens elements wherein the second lens element is a negative lens having strong power, th... | 03/19/1985 |
| 4435049 | Telephoto lens system A telephoto lens system is disclosed comprising first, second and third positive meniscus lens components each having the convex surface on the object side, a fourth negative meniscus lens component having the convex surface on the object side, a fifth po... | 03/06/1984 |
| 4232941 | Objective lens system for microscopes An objective lens system for microscopes which has a large numerical aperture and a long working distance and wherein the secondary spectrum is sufficiently minimized and curvature of field, coma, etc. are favorably corrected over a wide range of visual f... | 11/11/1980 |
| 4232940 | Objective lens system for microscopes An apochromat type high magnification objective lens system for microscopes comprising a first cemented semispherical lens component, a second positive meniscus lens component, a third cemented lens component consisting of three lens elements, a fourth ce... | 11/11/1980 |
| 4154508 | Rear conversion lens A rear conversion lens system to be mounted on the image side of a photographic lens to enlarge the total focal length of the entire lens system including the photographic lens comprises a diverging group and a converging group disposed on the image side ... | 05/15/1979 |
| 4045127 | Enlarging lens system A large-aperture enlarging lens system which comprises a first positive meniscus lens component, a second positive meniscus lens component, a third lens component consisting of two lens elements, a fourth lens component consisting of two lens elements and... | 08/30/1977 |
