PROBLEM TO BE SOLVED: To provide an optical system that can achieve size reduction and high resolution across a wide angle of view in an imaging device and a projection device.SOLUTION: There is provided an optical system 10 comprising, in order from an enlargement side, a front group 1, an aperture stop 3, and a rear group 2, where the front group 1 includes a refractive surface 11a in a convex shape toward the enlargement side; the rear group 2 includes a concave reflection surface 12b; when the radius of curvature of the refractive surface 11a is Rl (mm), the interval between the refractive surface 11a and aperture stop 3 is Ll (mm), the radius of curvature of the reflection surface 12b is Rm (mm), and the interval between the aperture stop 3 and reflection surface 12b is Lm (mm), the conditional expressions 0.7≤|Rl|/Ll≤1.5 and 2≤|Rm|/Lm≤7 are satisfied.SELECTED DRAWING: Figure 1

    【課題】 撮像装置や投影装置において、小型化及び広画角にわたる高解像度化を実現可能な光学系を提供すること。【解決手段】 拡大側から順に、前群1、開口絞り3、及び後群2を有する光学系10であって、前群1は、拡大側に向かって凸形状の屈折面11aを含み、後群2は、凹形状の反射面12bを含み、屈折面11aの曲率半径をRl(mm)、屈折面11aと開口絞り3との間隔をLl(mm)、反射面12bの曲率半径Rm(mm)、開口絞り3と反射面12bとの間隔をLm(mm)、とするとき、0.7≦|Rl|/Ll≦1.5、2≦|Rm|/Lm≦7なる条件式を満足する。【選択図】 図1


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    Title :

    OPTICAL SYSTEM, AND IMAGING DEVICE AND PROJECTION DEVICE INCLUDING THE SAME


    Additional title:

    光学系、それを備える撮像装置及び投影装置


    Contributors:

    Publication date :

    2017-09-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / G01C Messen von Entfernungen, Höhen, Neigungen oder Richtungen , MEASURING DISTANCES, LEVELS OR BEARINGS / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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