JPH0695229A - Finder device - Google Patents

Abstract

PURPOSE:To observe an excellent finder image by displaying information that a mode is a photographing area limiting mode in which a photographing area is limited to a part out of a photographing effective area within finder visual field by interlocking with the operation of a photographing area limiting means. CONSTITUTION:The photographing area limiting means 14 is attachably/ detachably provided in an optical path, and in the case of the photographing area limiting mode (panorma mode), it is inserted in the optical path to limit a part in a vertical direction within the photographing area to obtain a long sideways photographing range. Indexes 1a-1d showing a photographing range in the case of the panorama mode are provided at a part of the periphery of a finder visual field frame 1. An area within the line segments linking points 1a(1c) and 1b(1d) shows the photographing range in the panorama mode. At the time of photographing in the panorama mode, the means 14 is inserted into the optical path by a control means 15. Simultaneously, panorama mode information 1e showing that it is panorama mode photographing is displayed out of the photographing range in the panorama mode by a display means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finder device suitable for a photographic camera, a video camera, etc., for example, a finder for superimposing predetermined information together with a finder image within a finder field so that both can be observed simultaneously. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, in a finder device used for a photographic camera, a video camera or the like, information such as an aperture value, a shutter speed, and focusing is displayed outside the finder field. Then, regarding the display of the information that particularly requires the photographer to pay attention, a part of the viewfinder image within the viewfinder field is superimposed and displayed.

Various methods have been proposed for displaying information in a part of the field of view of a finder. For example, a method of disposing a liquid crystal display plate near the image plane of the finder system, a method of superimposing a part of the finder image using a hologram proposed in Japanese Patent Laid-Open No. 53-32048, and the like. There is.

On the other hand, recently, a part of the photographing screen is trimmed, and the photographing screen size is changed from the aspect ratio of 3: 4, for example, 13 :.
Various cameras having a so-called panoramic mode that is widened horizontally to 36 have been proposed.

Generally, in a camera, it is desirable that an actual photographing range and an observation range observed in the viewfinder field correspond to each other.

For this reason, in a camera having a panorama mode, when switching the panorama mode, a shooting range limiting member is inserted in the shooting system to limit the shooting screen for panoramic shooting and a part of the viewfinder system is shielded from light. The members are arranged to limit the viewfinder field so that it becomes a horizontally long viewfinder field.

[0007]

In a conventional camera having a panorama mode, a light-shielding member is provided in the vicinity of the image plane of the finder so that it can be inserted and removed in order to make the finder field of view observed during panoramic photography horizontally. There is.

Therefore, when the light-shielding member is inserted or removed, dust or dirt is likely to adhere to the finder image formation surface, the viewfinder field is soiled, and dust and dirt are observed at the same diopter as the viewfinder image. There was a problem that it would end up.

A first object of the present invention is to accompany the operation of the photographing area limiting means for limiting the photographing range provided in the photographing system when performing panoramic photographing with a camera having a panoramic mode,
By displaying the panoramic shooting area information and the panorama mode information in the viewfinder without using a movable member, it is possible to effectively prevent dust and dirt from adhering to the viewfinder image formation surface and to obtain a good viewfinder image. To obtain a finder device that enables observation.

On the other hand, in the method of using the liquid crystal display plate to display information in the viewfinder field, the amount of passing light is reduced when the liquid crystal display plate is inserted into the optical path, so that the viewfinder field becomes dark. There was a point.

Further, in the method of displaying information by performing superimposition using a hologram, various kinds of information are mixed because the hologram is irradiated with reproducing light and the diffracted light generated from the hologram is used for observation. If so, it tends to be difficult to display good information.

A second object of the present invention is to appropriately set the light source means for irradiating the hologram with reproduction light when a plurality of pieces of information are displayed and observed in the field of view of the finder using the hologram. It is to obtain a finder device that can observe satisfactorily with a finder image.

[0013]

The finder device according to the present invention is (1-a) a finder device for use in an image pickup device having a photographing region limiting means for limiting a photographing region in a photographing screen, wherein the finder device carries out the photographing. It is characterized in that, in conjunction with the operation of the area limiting means, information indicating that the shooting area is limited to a part outside the effective shooting area in the viewfinder is displayed.

(1-b) In a finder apparatus used in an image pickup apparatus having a photographing area limiting means for limiting a photographing area in a photographing screen, the finder apparatus forms a finder image on a predetermined surface with an objective lens, A viewfinder image on a predetermined surface is observed by an eyepiece lens, and a display section using a hologram and a light source for illuminating the display section in an oblique direction are provided in the vicinity of the predetermined surface. In conjunction with the operation of, the light source is operated to display information indicating that the display area is in the shooting area restriction mode in which the shooting area is restricted to a part outside the shooting effective area in the viewfinder field. It is characterized by being.

In particular, the hologram of the display section is a relief hologram.

(1-c) When a viewfinder image formed on a predetermined surface by an objective lens is observed by an eyepiece lens, a display section using a hologram near the predetermined surface and a main section for illuminating the display section obliquely It is characterized in that a plurality of light sources that emit light fluxes having different wavelengths are provided and the light emission states of the plurality of light sources are controlled to observe the information recorded on the display section.

In particular, it is characterized in that the information on the display section is observed by switching between a substantially transparent state and a plurality of color lights, and the hologram on the display section is a relief hologram.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view of the essential parts of a first embodiment when the finder device of the present invention is applied to a lens shutter camera.

Reference numeral 9 in the drawing denotes a photographing system (photographing lens), which is composed of a zoom lens. Reference numeral 3 denotes a finder device, which is composed of a secondary image-forming real image type finder system and is provided independently of the photographing system 9. The photographing system 9 has a lens group 4 having a negative refractive power and a lens group 5 having a positive refractive power,
Both lens groups 4 and 5 are moved on the optical axis as indicated by arrows 4a and 5a to perform zooming from the wide-angle end to the telephoto end. Reference numeral 2 is a photoconductor such as a film surface or a solid-state image sensor (CCD).

Reference numeral 14 denotes a photographing area limiting means, which is detachably provided in the optical path and is inserted in the optical path in the panorama mode (photographing area limiting mode) so as to be in the vertical direction (vertical direction) of the photographing range. Is limited to a horizontally long (for example, aspect ratio 13:36) shooting range.

Reference numeral 101 denotes an objective lens, which is composed of a variable power system having a lens group 6 having a negative refractive power and a lens group 7 having a positive refractive power. The lens groups 6 and 7 are moved along the optical axis as indicated by arrows 6a and 7a in conjunction with the zooming of the photographing system 9 to perform zooming from the wide angle end to the telephoto end.

Reference numeral 8 denotes a field lens, which is an image plane 13
It is provided in the vicinity and mainly collects off-axis light flux and guides it to the lens group that follows. A viewfinder field frame 1 is provided in the vicinity of the image forming surface 13 on which the viewfinder image formed by the objective lens 101 is formed.

As shown in FIG. 2, the finder field frame 1 is provided with indexes (cuts) 1a to 1d indicating a photographing range in the panorama mode on a part of its periphery.

In FIG. 2, point 1a (1c) and point 1b (1
The area within the line segment connecting (d) and (d) shows the viewfinder field (shooting range) in the panorama mode. 1e
Is panorama mode information (shooting area restriction mode information), which is provided outside the shooting range of the panorama mode.

Reference numeral 10 denotes an erecting erect image prism as an image inverting means, which is composed of, for example, a Porro prism, and makes an inverted finder image formed on the image forming surface 13 into an erecting erect image.
Reference numeral 11 denotes an eyepiece lens, which observes the finder image formed on the image plane 13 from the observation pupil 12 via the erecting image prism 10.

In the present embodiment, when photographing in the panorama mode, the control means 15 inserts the photographing area limiting means 14 into the optical path. Along with that, the panorama mode information 1e indicating that the panorama mode shooting in which the shooting range is limited is displayed outside the shooting effective area of the viewfinder by the display means.

As described above, in this embodiment, when shooting in the panorama mode, the panorama mode shooting range and panorama mode information are displayed in the viewfinder field without using any movable part in the viewfinder device. Thus, it is possible to obtain a finder device capable of observing a good finder image and various kinds of information in which dust and dirt are prevented from entering the finder system and the adverse effects thereof are removed.

FIG. 3 is a schematic view of the essential portions of Embodiment 2 when the finder device of the present invention is applied to a single-lens reflex camera. In this embodiment, the panoramic mode information is displayed using the reflection relief hologram 21.

In the figure, reference numeral 25 is an objective lens, 26 is a quick return mirror, and an arrow 26b is provided around a rotary shaft 26a.
It can be rotated in any direction. Reference numeral 2 is a photosensitive surface (film surface, imaging surface). Reference numeral 25a denotes a primary image-forming surface, which is an equivalent surface to the photosensitive surface 2 via the quick return mirror 26, on which an object image (finder image, aerial image) is formed by the objective lens 25. .

Reference numeral 14 denotes a photographing area limiting means, which is the same as that of the first embodiment shown in FIG. Reference numeral 27 denotes a first field lens, which is arranged in the vicinity of the primary image forming surface 25a, collects a light flux based on a subject image on the primary image forming surface 25a, and efficiently guides it to a subsequent optical element. is doing. 28 is a mirror.

Reference numeral 29 is a re-imaging system (erector), and 1
The subject image on the next image forming surface 25a is re-formed as an erect image on the secondary image forming surface 25aa. Reference numeral 20 denotes a second field lens, which is arranged such that its rear surface substantially coincides with the secondary image formation surface 25aa. The primary image forming surface 25a and the secondary image forming surface 25aa are formed by the erector 29 and the second field lens 20.
It is optically conjugated via.

Reference numeral 1 denotes a finder field frame, which is arranged near the secondary image plane 25aa and limits the finder field. The viewfinder frame 1 has an index (1a indicating the shooting range in the panorama mode as shown in FIG. 2).
~ 1d) are provided. Reference numeral 21 denotes a reflective relief hologram as a display unit, which is provided near the secondary image forming surface 25aa. In the hologram 21, the panorama mode information 1e as shown in FIG. 2 is recorded outside the effective photographing range.

Reference numeral 23 denotes a light source means, which is formed of a light emitting diode or the like and is provided outside the optical path of the finder, and irradiates the hologram 21 with reproduction light. Reference numeral 24 denotes an eyepiece lens for observing the finder image re-imaged on the secondary imaging surface 25aa and the panoramic mode information recorded on the hologram 21.

In this embodiment, the light source means 2 is used during normal photographing.
3 is turned off, and the hologram 21 is in a transparent state. When shooting in the panorama mode, the control unit 15 inserts the shooting area limiting unit 14 into the optical path. Along with that, the reproduction light from the light source means 23 is transmitted to the hologram 2
Irradiate 1. As a result, as shown in FIG. 2, the panorama mode information 1e is superimposed and displayed outside the effective panoramic shooting range of the viewfinder.

FIG. 4 is a schematic view of the essential portions of Embodiment 3 of the finder apparatus of the present invention. In the figure, the same elements as those in the second embodiment of FIG. 3 are designated by the same reference numerals.

In this embodiment, the objective lens 25 is set to 1
The finder image formed on the next image forming surface 25a is re-imaged on the secondary image forming surface 25aa via the second field lens 20 by the re-imaging system (erector) via the first field lens 27 and the mirror 28. There is.

The hologram 3 is provided near the secondary image plane 25aa.
0 is provided. The finder image formed on the secondary image forming surface 25aa is observed by the eyepiece 24 together with the information 30a recorded on the hologram 30 by turning on the light source means 23 described later. Hologram 3 here
0 consists of rainbow type relief hologram,
As shown in FIG. 5, the information 30a is written in a part thereof.

The rainbow hologram 30 is a known one which is observed in a rainbow color when reproduced and illuminated with white light.
The relief hologram is a well-known relief hologram that is diffracted by unevenness on the surface and is manufactured by a hot press method or the like.

Reference numeral 23 denotes a light source means, which has a plurality of light sources 23a and 23b (two in the figure but two or more may be used) which emit light beams having different main wavelengths. Of these, the light source 23a is a red light emitting diode and the light source 23b is a green light emitting diode.

In this embodiment, one of the light source means 23 is turned on and the information 30a recorded on the hologram 30 is observed by the colored light based on the light source.

FIG. 6 is an explanatory diagram of diffracted light generated from the hologram 30 when the hologram 30 is irradiated with reproduction light from the light source means 23.

In the figure, reference numerals 40 to 43 indicated by dotted lines indicate 0th-order diffracted light, -1st-order diffracted light and -2nd-order diffracted light from the hologram 30 based on the luminous flux from the red light emitting diode 23a.
This is the first-order diffracted light. Further, the solid lines 50 to 53 are holograms 3 based on the light flux from the green light emitting diode 23b.
It represents the same diffracted light from zero. Incidentally, L is the optical axis of the finder system.

In this embodiment, information is displayed by utilizing the wavelength dependence of the diffracted light in the hologram.

In FIG. 6, the red light emitting diode 23a
The reproduction light is emitted from the green light emitting diode 23b to the hologram 30 with an angle difference θ. The angle difference θ at this time is determined by the respective −first-order diffracted light (41, 41,
51) is diffracted toward the eyepiece lens 24 in substantially the same direction.

Further, diffracted light of other orders does not enter the eyepiece lens 24 and is diffracted in a direction not observed. As a result, the light sources 23a and 23b are turned on and off, and a transparent display, a red display, and a green display are displayed on one display.
Information of one state is displayed.

In the embodiment shown in FIG. 5, for example, during normal photographing, both the light emitting diodes are turned off to make the information 30a transparent, and only the finder image is observed.
And in the flash mode, information 3 appears while charging.
0a is displayed in red, information 30a is displayed in green when charging is completed, and information on the state of charge of the strobe is displayed.

[0047]

According to the present invention, (2-a) in a camera having a panorama mode, the viewfinder field is accompanied by the operation of the photographing area limiting means for limiting the photographing range provided in the photographing system during panoramic photographing. By displaying the panorama shooting area information and panorama mode information in the inside without using a movable member, it is possible to effectively prevent dust and dirt from adhering to the finder image formation surface, and to observe a good finder image. We have achieved a viewfinder device that is possible.

(2-b) A plurality of pieces of information are displayed in a finder image by appropriately setting a light source means for irradiating the hologram with reproduction light when displaying and observing a plurality of pieces of information in the finder field using the hologram. Along with this, we have achieved a finder device that allows good observation.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part of a first embodiment when a finder device of the present invention is applied to a lens shutter camera.

FIG. 2 is an explanatory view of a part of FIG.

FIG. 3 is a schematic view of the essential portions of Embodiment 2 when the viewfinder device of the present invention is applied to a single-lens reflex camera.

FIG. 4 is a schematic view of the essential portions of Embodiment 3 when the viewfinder device of the present invention is applied to a single-lens reflex camera.

5 is an explanatory view of a part of FIG.

FIG. 6 is an explanatory diagram of a part of FIG.

[Explanation of Codes] 1 viewfinder frame 2 photoconductor 3 finder device 4, 5 lens group 6 1st group 7 2nd group 8, 20 field lens 9 imaging system 10 image inverting means 11, 24 eyepiece 12 observation pupil 13 binding Image plane 14 Imaging area limiting means 15 Control means 101 Objective lens 1e Panorama mode information 21,30 Display section (hologram) 23 Light source means 25 Objective lens 27 First field lens 26,28 Mirror 29 Re-imaging system

Claims (6)

[Claims] 1. A finder device for use in an image pickup apparatus having a photographing area limiting means for limiting a photographing area within a photographing screen, wherein the finder device is linked to the operation of the photographing area limiting means to enable photographing within the viewfinder field. A viewfinder device, wherein information indicating that the shooting area is limited to a part outside the area is displayed. 2. A finder apparatus used in an image pickup apparatus having a photographing area limiting means for limiting a photographing area in a photographing screen, wherein the finder apparatus forms a finder image on a predetermined surface by an objective lens, and the finder image is formed on the predetermined surface. The finder image of is observed with an eyepiece, and a display section using a hologram and a light source for illuminating the display section in an oblique direction are provided in the vicinity of the predetermined surface. In conjunction with this, the light source is operated to display information indicating that the display area is in the shooting area restriction mode in which the shooting area is restricted to a part outside the shooting effective area in the finder field. Characteristic finder device. 3. The finder device according to claim 2, wherein the hologram of the display unit is a relief hologram. 4. When a finder image formed on a predetermined surface by an objective lens is observed by an eyepiece lens, a display section using a hologram near the predetermined surface and a main wavelength for illuminating the display section from an oblique direction are different from each other. A finder device characterized in that a plurality of light sources for emitting a light flux are provided and the light emitting states of the plurality of light sources are controlled to observe the information recorded on the display section. 5. The finder device according to claim 4, wherein the information on the display unit is observed by switching between a substantially transparent state and a plurality of color lights. 6. The finder device according to claim 4, wherein the hologram of the display unit is a relief hologram.