JPH0764153A - Finder lens cover for camera - Google Patents

Abstract

PURPOSE:To eliminate a ghost image without performing multicoating processing to the surface of a glass cover by forming the side of the glass cover faced to a lens side as a concave reflection surface. CONSTITUTION:When a high luminance image is generated by projecting the image onto the surface of an LCD 10 by a backlight 12, a light beam L from the image is refracted and transmitted through the lens 9 and reflected on the reflection surface of the glass cover 13 in an electronic view finder 7. Since the reflection surface of the glass cover 13 is formed to be a concave shape being a circular-arc shaped surface, an incident angle on the reflection surface and the reflecting angle of reflected light L1 reflected on the reflection surface are different, so that a reflected image is formed at a point P before the surface of the LCD 10 and dispersed before it reaches the surface of the LCD 10, thereby preventing the ghost image from being formed on the surface of the LCD 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finder lens cover of a camera suitable for use in a so-called camera-integrated VTR electronic viewfinder (hereinafter referred to as EVF) having a photographing function and a recording / reproducing function. Is.

[0002]

2. Description of the Related Art E of this type of conventional camera-integrated VTR
The VF is composed of a liquid crystal display device having a backlight, a plurality of lens groups, and a finder lens cover.
The finder lens cover protects the liquid crystal display device and the lens group in the EVF and also prevents dust and the like from entering.

[0003]

However, since the finder lens cover conventionally uses a flat glass cover, the image on the liquid crystal display device surface is reflected by the inner surface of the glass cover, and this reflected image is displayed on the liquid crystal. There is a problem that a ghost image is formed on the surface of the display device, and as a result, a ghost image that is visible only on the inner surface of the EVF that is not on the captured screen occurs.

To explain this problem in more detail with reference to FIG. 3, reference numeral 31 is a liquid crystal display device (hereinafter referred to as LCD), 32 is a backlight for illuminating an image on the LCD 31, and 33 is an image illuminated by the backlight 32. The lens 33 is composed of a plurality of lenses, but one lens is shown for the sake of explanation. Reference numeral 34 is a flat glass cover as an eyepiece.

The EVF configured as described above is
When the image on the LCD 31 surface is illuminated by the backlight 32 and a high-intensity image is generated, the light ray L from the image is reflected by the lens 3
3 is refracted and transmitted and reflected on the surface of the glass cover 34. The reflected light L ₁ is refracted and transmitted through the lens 33 and LC
The light is focused on the D31 surface to form an image. As a result, when the EVF is viewed from the outside of the glass cover 34, a ghost image that is visible only on the inner surface of the EVF that is not on the captured screen is generated on the LCD 31 surface.

The reason is that the glass cover 34 is flat.
Therefore, the light ray L that has passed through the lens 33 causes the glass cover 3
4 incident angle and reflection reflected from the glass cover 34
Light L ₁Since the reflection angle with
I found out that a ghost image is generated by forming an image
There is.

As a countermeasure against the above-mentioned ghost image, conventionally, the above-mentioned problem has been solved by multi-coating both surfaces of the glass cover 4 to reduce the amount of light reflected by the glass cover 34. However, since the multi-coating process is expensive, it has been a factor of increasing the EVF cost.

The present invention has been made to solve the above-mentioned problems, and it is possible to surely eliminate a ghost image on the LCD surface without performing an expensive multi-coating process on the glass cover surface. The objective is to obtain a viewfinder lens cover for the camera.

[0009]

In order to achieve the above object, a finder lens cover of a camera according to the present invention is
In a camera equipped with a liquid crystal display device having a backlight, an electronic viewfinder consisting of a plurality of lens groups and a finder lens cover, a reflection image reflected from the liquid crystal display device to the finder lens cover through the lens group is formed on the liquid crystal display device surface It is equipped with a viewfinder lens cover set as a reflective surface.

In the finder lens cover of the camera according to the preferred embodiment of the present invention, the finder lens cover is formed in a concave shape having an arc surface on the side facing the lens.

[0011]

In the finder lens cover of the camera according to the present invention having the above-described structure, the side facing the lens is formed in a concave shape, so that the light beam transmitted from the liquid crystal display device enters the finder cover. Since the angle and the reflection angle of the reflected light reflected by the finder cover are different, a reflected image is formed in front of the LCD surface and dispersed before reaching the LCD surface to eliminate a ghost image.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which an embodiment of a finder lens cover of a camera according to the present invention is applied to a camera-integrated VTR will be described below with reference to the drawings. FIG. 1 is an external perspective view of a camera-integrated VTR of this example, and FIG. 2 is a cross-sectional view of an EVF, showing an example in which one lens is omitted in the EVF.

In FIG. 1, reference numeral 1 is a camera-integrated VT.
R is a main body part, 2 is a photographing lens part, 3 is a sound collecting part, 4
Is a power switch, and 5 and 6 are various operation switches for operating the camera-integrated VTR 1. 7 is an EVF (electronic viewfinder).

FIG. 2 is a sectional view of the EVF 7. In FIG. 2, 8 is a lens barrel that supports a lens 9, 10 is an LCD (liquid crystal display device) arranged on the photographing lens side of the lens barrel 8 (the left end in the figure), and 11 is a light arranged in front of the LCD 10. A diffuser plate 12 is a backlight for illuminating the LCD 10. Reference numeral 13 denotes a glass cover as a finder lens cover, which is supported by a cover frame 14 and held at the end of the lens barrel 8. The side of the lens cover 13 facing the lens 9 is formed into a concave reflecting surface 13a having an arc surface.

Next, the operation of the EVF 7 using the finder lens cover according to the present invention having the above structure will be described.

The image on the LCD 10 surface is the backlight 12
When a high-intensity image is generated by irradiation with the light, the light ray L from the image is refracted and transmitted through the lens 9 and reflected by the reflection surface 13a of the glass cover 13. The reflective surface 13 of this glass cover 13
Since a is formed in an arcuate concave shape, the angle of incidence on the reflecting surface 13a and the reflection angle of the reflected light L ₁ reflected on the reflecting surface 13a are different, so at a point P in front of the LCD 1 surface. It is possible to prevent the reflected image from being formed and dispersed before reaching the LCD 1 surface to form a ghost image on the LCD 1 surface.

As described above, in the finder lens cover of the present invention, the glass cover 13 is formed with the concave reflecting surface 13a on the side facing the lens side, so that the glass cover surface is multi-coated as in the conventional case. It is possible to effectively eliminate the ghost image without any.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

The finder lens cover of the camera of the present invention has been described in the embodiment as being applied to the EVF of the camera-integrated VTR, but it can be widely used for the finder lens cover of the camera.

[0020]

As described above, the viewfinder lens cover of the camera according to the present invention is set as a reflection surface in which a reflected image reflected from the liquid crystal display device through the lens group to the finder lens cover is not formed on the liquid crystal display device surface. By providing the finder lens cover, there is an effect that the ghost image can be effectively eliminated without performing the multi-coating treatment on the glass cover surface unlike the conventional case. Further, since the multi-coating treatment on the glass cover surface is not necessary, the glass cover can be manufactured at a low cost.

[Brief description of drawings]

FIG. 1 is an external perspective view of a camera-integrated VTR of this example.

FIG. 2 is a sectional view of an EVF.

FIG. 3 is an explanatory diagram of a conventional EVF.

[Explanation of symbols]

 7 EVF 8 lens barrel 9 lens 10 LCD 11 light diffusing plate 12 backlight 13 glass cover 13a reflective surface

Claims (2)

[Claims] 1. A camera provided with a liquid crystal display device having a backlight, an electronic viewfinder comprising a plurality of lens groups and a finder lens cover, and a reflection image reflected from the liquid crystal display device through the lens groups to the finder lens cover. Is provided with a finder lens cover set as a reflecting surface that does not form an image on the surface of the liquid crystal display device. 2. The finder lens cover for a camera according to claim 1, wherein the finder lens cover has a concave shape of an arc surface on the side facing the lens.