| Patent Number |
Title Of Patent |
Date Issued |
| 6704052 |
Image pickup optical system comprising a prism fixing member for preventing a deterioration in t |
March 9, 2004 |
| The invention relates to an image pickup optical system which can make a sensitive tradeoff between the precision of alignment of a decentration optical prism used as an image formation element for an electronic camera or the like with respect to an image pickup element and ease of f |
| 6310736 |
Image-forming optical system and viewing optical system |
October 30, 2001 |
| A viewing optical system and image-forming optical system in which an intermediate image is formed once and two decentered prisms, i.e. first and second prisms, are arranged to correct each other's decentration aberrations, thereby attaining a wide viewing field angle and a short foc |
| 6185046 |
Multiple prism image forming optical system |
February 6, 2001 |
| A high-performance image-forming optical system made compact and thin by folding an optical path using reflecting surfaces arranged to minimize the number of reflections. The image-forming optical system has a first prism placed on the object side and a second prism placed on the image s |
| 6166858 |
Image-forming optical system using prism elements |
December 26, 2000 |
| A high-performance image-forming optical system made compact and thin by folding an optical path using reflecting surfaces arranged to minimize the number of reflections. The image-forming optical system has a first prism placed on the object side and a second prism placed on the image s |
| 6147808 |
Decentered image-forming optical system |
November 14, 2000 |
| A high-performance image-forming optical system made compact and thin by folding an optical path using reflecting surfaces arranged to minimize the number of reflections. The image-forming optical system has a first prism placed on the object side and a second prism placed on the image s |
| 6124989 |
Image-forming optical system |
September 26, 2000 |
| A high-performance image-forming optical system made compact and thin by folding an optical path using reflecting surfaces arranged to minimize the number of reflections. The image-forming optical system has only one prism member. The prism member has a first surface through which a ligh |
| 6104540 |
Decentered optical system |
August 15, 2000 |
| An optical system capable of correcting aberrations due to three-dimensional decentration by using a rotationally asymmetric surface having no plane of symmetry. The optical system includes, from the ray bundle entrance side, a first surface (3) serving as both a first transmitting s |
| 5917656 |
Decentered optical system |
June 29, 1999 |
| An optical system capable of correcting aberrations due to three-dimensional decentration by using a rotationally asymmetric surface having no plane of symmetry. The optical system includes, from the ray bundle entrance sides, a first surface (3) serving as both a first transmitting |
