CN2239631Y

CN2239631Y - Whole right image viewfinder viewed from camera back

Info

Publication number: CN2239631Y
Application number: CN 95229115
Authority: CN
Inventors: 孙青青
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-20
Filing date: 1995-12-20
Publication date: 1996-11-06
Anticipated expiration: 2005-12-20

Abstract

The utility model relates to a whole right image viewfinder viewed from camera back, comprising a reflection mirror (1) which is positioned at the rear of the frosted glass and forms a 45-DEG angle with the frosted glass, and a roof pentaprism (2) which is positioned in the emergent light path of the reflection mirror (1). A rocking magnifying glass can also be arranged between the reflection mirror (1) and the roof pentaprism (2). The utility model has the advantages of simple structure, small size, light weight and easy installation; the look direction accords with the filmed direction, which can obtain the perfect accordance of positive image and filmed objects.

Description

Machine is carried on the back the complete erecting image finder of camera of finding a view

The utility model relates to a kind of machine back of the body finds a view according to the complete erecting image finder of machine, belongs to the view finder technical field of camera.

The machine back of the body camera of finding a view is that a kind of imaging plane at camera is by putting the camera that frosted glass is found a view.The characteristics of this existing camera are find a view frosted glass and the shared plane of film, and both viewfinder ranges, focus are in full accord, do not have parallax; The general larger-size sheet film that uses as 57 * 87 millimeters, 102 * 127 millimeters, 127 * 178 millimeters page or leaf sheets, can obtain the image of high definition more; Professional photographer's specific (special) requirements can freely be adjusted, be satisfied to linear perspective.Based on above advantage, this camera is widely used in Professional Photography fields such as advertisement, building, landscape.But because the demonstration of this view finder of camera is an antipodal up and down inverted image, frame composition is extremely inconvenient.Use not only time-consuming, but also effort, constitute a most fatal shortcoming of this camera.

The purpose of this utility model provides a kind of machine and carries on the back the complete erecting image finder of camera of finding a view, and overcomes existing machine and carries on the back the shortcoming that the camera of finding a view exists, and is simple in structure, easy to use.

The technical scheme that the utility model achieves the above object is as follows:

Designed a kind of machine and carried on the back the complete erecting image finder of camera of finding a view, comprised that also is positioned at the frosted glass rear becomes miter angle with frosted glass a catoptron, and a ridge pentaprism 2 that is arranged in the catoptron emitting light path.

Be described in further detail by embodiment below in conjunction with accompanying drawing.

Fig. 1 is the synoptic diagram of the utility model first embodiment;

Fig. 2 is the synoptic diagram of the left side view of Fig. 1.

Fig. 3 is the synoptic diagram of another embodiment of the utility model.

Shown in Figure 1, place machine to carry on the back the camera frosted glass rear of finding a view by a slice and become the catoptron 1 of miter angle that the image on the frosted glass is adjusted into heterochiral incomplete erect image with frosted glass.By one piece of ridge pentaprism 2 that is arranged in catoptron 1 emitting light path this incomplete erect image is adjusted into complete erect image again.Catoptron 1 and ridge pentaprism 2 are separately fixed on the erecting image finder shell 3.Erecting image finder shell 3 can be made up of two parts.Ridge pentaprism 2 also can be replaced by other optical element or assembly that can make heterochiral erect image be adjusted into complete erect image.

Fig. 2 is the synoptic diagram of the left side view of Fig. 1.Erecting image finder shell 3 is carried on the back the camera shadow shield mounting hole of finding a view with machine and is connected, and it is extremely convenient to install.

Another embodiment of the present utility model is the magnifier 4 that also is provided with swing between catoptron 1 and ridge pentaprism 2, and magnifier 4 is installed on the swivel arm 5, also is provided with the rotation axis that has knob 6 that is connected with swivel arm 5 other ends; This magnifier is positioned at light path outside on catoptron 1 and the ridge pentaprism at ordinary times, near the inwall of erecting image finder shell 3; When needs amplify vernier focusing with the image part, make magnifier place light path by the knob on the outside rotation axis of erecting image finder shell 3.

The utility model has the advantages that and created a complete erect image, camera is found a view Direction of observation is consistent with the shooting direction. The erect image that obtains is not subjected to picture horizontal, perpendicular The impact of putting. Volume is little, in light weight, focusing is convenient, utilizes the original screening of camera Tabula rasa installing hole, removal and installation are extremely convenient.

The complete erecting image finder of the utility model makes the Professional Photography, and the person uses large scale computer The back of the body camera image in the view finder as using 135 cameras of finding a view of finding a view Be complete erect image.

Claims

1, a kind of machine is carried on the back the complete erecting image finder of camera of finding a view, and it is characterized in that, comprises that also is positioned at the frosted glass rear becomes miter angle with frosted glass a catoptron (1), and a ridge pentaprism (2) that is arranged in catoptron (1) emitting light path.

2, carry on the back the complete erecting image finder of camera of finding a view according to the machine of claim 1, it is characterized in that catoptron (1) and ridge pentaprism (2) are separately fixed on the erecting image finder shell (3).

3, carry on the back the complete erecting image finder of camera of finding a view according to the machine of claim 2, it is characterized in that, the erecting image finder shell is carried on the back the camera shadow shield mounting hole of finding a view with machine and is connected.

4, carry on the back the complete erecting image finder of camera of finding a view according to the machine of claim 1, it is characterized in that, also be provided with the magnifier (4) of swing between catoptron (1) and the ridge pentaprism (2).

5, carry on the back the complete erecting image finder of camera of finding a view according to the machine of claim 4, it is characterized in that magnifier (4) is installed on the swivel arm (5), also comprise the rotation axis that has knob (6) that is connected with swivel arm (5) other end.