RU2543604C2 - Slit pinhole camera - Google Patents

Abstract

FIELD: physics, optics.

SUBSTANCE: invention relates to mechanics and can be used in laboratory courses in physics and mathematics in secondary and higher educational institutions to study optical and projection tasks in spatial geometry. A slit pinhole camera, consisting of a lightproof box with a hole in one of the walls made in the form of a slit with a parallel row of thin long light-absorbing plates placed perpendicular to the direction of said slit, and a screen (cloudy glass or thin white paper) at the opposite wall, enables to convert an optical image of objects into a left-handed coordinate system.

EFFECT: improved design.

Description

The invention relates to the field of mechanics and can be used to conduct workshops in physics and mathematics in higher and secondary educational institutions for the study of optical and projection problems of spatial geometry.

Known pinhole camera [1], consisting of a lightproof box with a hole in one of the walls and a screen (frosted glass or thin white paper) on the opposite wall, which allows to obtain an optical image of objects. The aim of the invention is the conversion of the optical image in the left coordinate system.

The technical result, which cannot be achieved by any of the known similar technical solutions, consists in constructing a specialized slit for projecting an image. The well-known left image reflected in the mirror is built in the pinhole pinhole camera on other optical principles.

In FIG. 1 shows a General structural diagram of the device.

The device consists of a lightproof box 1 with a slit hole 2 in one of the walls, with a parallel row of thin ones installed perpendicular to the direction of the slit, which ensures an increase in the light flux through the slit, and, to ensure a significant exclusion of diffraction on the light fluxes shared by them, long light-absorbing plates 3 _m and a screen 4 on the opposite wall, allowing to obtain an optical image of objects.

The device operates as follows. The light passing through each slot cell is projected onto the screen as an inverted line of the image. In total, these lines form a “mirror” image of objects. The novelty of the invention is due to the lack of long slotted holes in the devices of known pinhole cameras [2].

Information sources

1. Camera obscura. Material from Wikipedia - the free encyclopedia.

[Electronic resource]. URL: http: //ru.wikipedia.org/wiki/%CA%25EO%EC%25E5%F0%E0%EE%E1%F1%EA%F3%F0%E0 (accessed: 04/02/2013).

2. Adrianov Nikolai Alexandrovich Photographing without a lens with a small hole: For photographers, artist, engineer. and technicians. - St. Petersburg: Cl. ed. Auth., 1907.

Claims (1)

A pinhole camera obscura, consisting of a lightproof box with an opening in one of the walls and a screen on the opposite wall, characterized in that the hole is made in the form of a slit, perpendicular to the direction of which is parallel to a series of thin long light-absorbing plates that form a grid of holes that transmit light / image only in the vertical direction.