IMAGE READING DEVICE AND MANUFACTURING METHOD OF THE SAME

• Main Authors: YAMAGATA KOSAKU, AMEMORI YOSHINOBU, ARIMOTO HIRONOBU
• Format: Patent
• Language: English; Japanese
• Published: 01.04.2021
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

To obtain an image reading device and a method of the same that can easily expand the depth of field (improve the depth of field) without requiring basic characteristics of a lens body to be changed.SOLUTION: A lens body array and a slit unit are facing each other, and the length of the slit unit in a main scanning direction is adjusted to match an array cycle of cylinder members in the slit unit with an array cycle of lens bodies in the lens body array in the main scanning direction. The image reading device has a lens body array in which lens bodies are arrayed along the main scanning direction, a sensor element array in which sensor elements that receive light converged by the lens bodies are arrayed along the main scanning direction, respectively, and the slit unit that is disposed between the lens body array and the sensor element array and has a plurality of cylindrical members arrayed in the main scanning direction. The cylindrical members are through which the light converged by the lens body passes.SELECTED DRAWING: Figure 1 【課題】レンズ体の基本的な特性を変えることを必須とせずとも、被写界深度を拡大（被写界深度を改善）することが容易な画像読取装置及びその方法を得ること。【解決手段】レンズ体アレイとスリット部とを対向させ、スリット部の主走査方向の長さが調節して、スリット部における筒部材の配列周期と、主走査方向においてレンズ体アレイにおけるレンズ体の配列周期とを一致させている。画像読取装置は、レンズ体が主走査方向に沿ってアレイ状に配列されたレンズ体アレイと、レンズ体が収束した光をそれぞれ受光するセンサ素子が主走査方向に沿ってアレイ状に配列されたセンサ素子アレイと、レンズ体アレイとセンサ素子アレイとの間に配置され、主走査方向に配列された複数の筒部材を有するスリット部とを有し、筒部材は、レンズ体が収束した光が通過するものである。【選択図】 図１