PHOTOGRAPHING DEVICE

PURPOSE:To facilitate focusing even when an optical system has a large F number and the brightness of a subject is low by providing a means which divides a pupil into two in an optical path of photography, and performing the focusing through the divided pupil parts. CONSTITUTION:Luminous flux from t...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	MAJIMA TOSHIAKI
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:To facilitate focusing even when an optical system has a large F number and the brightness of a subject is low by providing a means which divides a pupil into two in an optical path of photography, and performing the focusing through the divided pupil parts. CONSTITUTION:Luminous flux from the subject 1 is split by two aperture parts 3b and 3c of a moving stop 3, and the image is observed through observation systems 3, 4, 7 and 8; when there are two images seen, the lens 2 is shifted in position so that the image of the subject 1 is seen as one point. When releasing operation is performed during photography after the focusing is completed, the moving stop 3 moves horizontally. Then, a quick-return mirror 4 is hopped up to form the optical path extending to a film 6, and the light from a viewfinder is cut off at the same time. Then, a shutter 5 is opened to expose the film 6 to the image of the subject 1.