A light amount adjustment device includes a base member, a rotation member rotatably held with respect to the base member, and a light amount adjustment member engaged with the rotation member and configured to be driven by the rotation member to adjust an amount of passing light. The rotation member includes a first surface area in contact with the base member and a second surface area not in contact with the base member. A surface roughness of the first surface area is greater than a surface roughness of the second surface area.


    Access

    Download


    Export, share and cite



    Title :

    Light amount adjustment device, imaging device, imaging system and moving object


    Contributors:
    BAI LONGJI (author) / KOYAMA TAKASHI (author) / XU YONGWANG (author)

    Publication date :

    2021-07-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / B64C AEROPLANES , Flugzeuge / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21W Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend den Gebrauch oder Einsatz von Leuchten oder Beleuchtungssystem , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K,  F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien



    LIGHT AMOUNT ADJUSTMENT DEVICE, IMAGING DEVICE, IMAGING SYSTEM AND MOVING OBJECT

    BAI LONGJI / KOYAMA TAKASHI / XU YONGWANG | European Patent Office | 2020

    Free access

    IRRADIATION LIGHT AMOUNT ADJUSTMENT DEVICE, IRRADIATION LIGHT AMOUNT ADJUSTMENT METHOD, AND PROGRAM

    MAEDA TSUYOSHI / HATAMOTO TAKUYA | European Patent Office | 2024

    Free access

    WEIGHT FLOATING AMOUNT ADJUSTMENT DEVICE OF MOVING CRANE AND WEIGHT FLOATING AMOUNT ADJUSTMENT METHOD

    KOYABATA AKIRA / OKA TAKAHIRO / WATANABE SHOJI et al. | European Patent Office | 2017

    Free access

    IMAGING DEVICE, IMAGING SYSTEM, MOVING OBJECT, METHOD, AND PROGRAM

    NAGAYAMA YOSHINORI / ZHU LINGLONG | European Patent Office | 2019

    Free access

    Imaging apparatus, imaging system, and moving object

    ARISHIMA YU / TOTSUKA HIROFUMI | European Patent Office | 2019

    Free access