IMAGING OPTICAL ELEMENT, PRINT HEAD, IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS

• Main Author: IMAI SHIGEAKI
• Format: Patent
• Language: English; Japanese
• Published: 27.04.2015
• Subjects: CORRECTION OF TYPOGRAPHICAL ERRORS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

PROBLEM TO BE SOLVED: To provide an imaging optical element that can be integrally molded and is easily adjustable for optical characteristics.SOLUTION: The imaging optical element includes a first imaging plane array 11, a prism array 12, a reflection surface 13, and a second imaging plane array 14. A normal line on a plane top of a plurality of imaging planes constituting the first imaging plane array, a normal line on a plane including ridge lines of a plurality of prisms constituting the prism array 12, a normal line on the reflection surface 13, and a normal line on a plane top of a plurality of imaging planes constituting the second imaging plane array, are defined as a first normal line, a second normal line, a third normal line, and a fourth normal line, respectively; and a direction of each normal line from the imaging optical element to the outside is defined as a positive direction. An angle α formed by the positive direction of the first normal line and the positive direction of the third normal line is an acute angle; and an angle formed by the positive direction of the second normal line and the fourth normal line is an acute angle. 【課題】 一体成型が可能であり、かつ、容易に光学特性の調整をすることができる。【解決手段】 第１結像面アレイ１１と、プリズムアレイ１２と、反射面１３と、第２結像面アレイ１４と、を有し、第１結像面アレイ１１を構成する複数の結像面の面頂点における法線を第１法線とし、プリズムアレイ１２を構成する複数のプリズムの稜線を含む平面における法線を第２法線とし、反射面１３の法線を第３法線とし、第２結像面アレイ１４を構成する複数の結像面の面頂点における法線を第４法線とし、第１法線と第２法線と第３法線と第４法線とについて、結像光学素子から外部に向かう方向を正方向とするとき、第１法線の正の方向と第３法線の正の方向とのなす角度αは鋭角であり、第２法線の正の方向と第４法線の正の方向とのなす角度 は鋭角である。【選択図】図６