JP2002174843A - Flashing device and camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make more direct light and more reflected light enter in a photographing viewing angle. SOLUTION: In the flashing device 3 provided with a flash light emitting part 30, a flash panel 31 arranged on the front side of the light emitting part 30, and a reflector 32 reflecting the light from the light emitting part 30 toward the panel 31, the panel 31 is provided with a rib 31d guiding the direct light projected from the light emitting part 30 into the photographing viewing angle at an opposed position to the light emitting part 30. Furthermore, the rib 31d and the light emitting part 30 are formed so that their thickness may be nearly the same. Then, the edge part of the rib 31d is formed to be a curved surface. The panel 31 is a concave cylindrical lens having a concave surface on an opposed side to the light emitting part 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash device and a camera having the flash device.

[0002]

2. Description of the Related Art As a flash device provided in a camera, for example, as shown in FIGS. 14 and 15, a flash light emitting portion 100, a flash panel 101 disposed in front of the flash light emitting portion 100, and a flash light emitting portion 10 are provided.
Reflective umbrella 1 that reflects light from 0 toward the flash panel
02.

As shown in FIG. 15, this flash panel 101 is formed of a convex lens or a convex Fresnel lens.
Further, as shown in FIG. 14, a flat panel or a corrugated panel or the like is used for blindfolding without using an optical shape.

[0004]

When a convex lens is formed on the flash panel 101 as described above, a larger amount of light rays passing through the flash panel 101 directly from the flash light emitting unit 100 can be included in the angle of view.
On the other hand, light rays that are reflected from the flash light emitting unit 100 to the reflector 102 and pass through the flash panel 101 act in a direction to escape to outside the shooting angle of view. In the case of a convex Fresnel lens, light rays are wasted on a discontinuous surface.

On the other hand, a flat plate having no optical action on the flash panel 101 or a corrugated panel intended only for blinding is a light beam reflected from the flash light emitting section 100 to the reflector 102 and passing through the flash panel 101. Although it does not escape outside the shooting angle of view,
There are problems such as that more rays from 0 directly pass through the flash panel 101 cannot enter the angle of view.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a flash device capable of increasing a direct number of light and a large amount of reflected light within a photographing angle of view and improving a guide number for flash photographing. It aims to provide a camera.

[0007]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

According to the first aspect of the present invention, there is provided a flash light emitting unit, a flash panel disposed in front of the flash light emitting unit, and a reflector for reflecting light from the flash light emitting unit toward the flash panel. Wherein the flash panel has a rib at a position facing the flash light-emitting unit, the rib guiding direct light projected from the flash light-emitting unit into a shooting angle of view. apparatus. ].

According to the first aspect of the present invention, the flash panel has a rib at a position facing the flash light-emitting portion, and the rib effectively directs the light projected from the flash light-emitting portion within the field of view. Can be led to.

According to a second aspect of the present invention, there is provided a flash light emitting section, a flash panel disposed in front of the flash light emitting section, and a reflector for reflecting light from the flash light emitting section toward the flash panel. In the flash device having the flash panel, the flash panel has a rib at a position facing the flash light-emitting unit, for guiding direct light projected from the flash light-emitting unit into a shooting angle of view. A flash device characterized in that the thickness of the flash light emitting portion is substantially the same. ].

According to the second aspect of the present invention, the flash panel has a rib at a position facing the flash light emitting portion, and the thickness of the rib is substantially equal to the thickness of the flash light emitting portion. The direct light projected from the flash light emitting unit can be more effectively guided within the shooting angle of view without damaging the reflected light.

According to a third aspect of the present invention, there is provided a flash light emitting section, a flash panel disposed in front of the flash light emitting section, and a reflector for reflecting light from the flash light emitting section toward the flash panel. In the flash device having the flash panel, the flash panel has a rib at a position facing the flash light emitting unit for guiding direct light projected from the flash light emitting unit into a shooting angle of view. A flash device characterized by having a curved shape. ].

According to the third aspect of the present invention, the flash panel has a rib at a position facing the flash light emitting portion, and a tip portion of the rib has a curved surface shape, and is directly projected from the flash light emitting portion. Light can be effectively guided within the shooting angle of view.

According to a fourth aspect of the present invention, the shape of the tip of the rib has the largest curvature among the curvatures for radiating all of the direct light incident on the rib into the photographing screen. The flash device according to claim 3, wherein: ].

According to the fourth aspect of the present invention, the direct light can be more effectively guided into the field of view without damaging the reflected light by the rib.

According to a fifth aspect of the present invention, the above-mentioned "the rib is
The flash device according to claim 1, wherein the flash device extends in a direction of the flash light emitting unit. ].

According to the fifth aspect of the present invention, the direct light can be more effectively guided into the field of view by the rib extending in the direction of the flash light emitting portion.

According to a sixth aspect of the present invention, there is provided a method as set forth in any one of the first to fifth aspects, wherein a tip of the rib is disposed close to the flash light emitting portion. Flash device. ].

According to the sixth aspect of the present invention, direct light can be more effectively guided into the angle of view by bringing the tip of the rib close to the flash light emitting portion.

According to a seventh aspect of the present invention, there is provided a method according to the first aspect, wherein the flash panel is a flat lens, and the flat panel lens has the rib at a position facing the flash light emitting portion. The flash device according to claim 6. ].

According to the seventh aspect of the present invention, the flash panel is a flat lens, and the reflected light can be converted into a more effective light flux by the flat lens to be guided into the shooting angle of view.

According to an eighth aspect of the present invention, there is provided an electronic apparatus according to the above aspect, wherein the flash panel is a concave lens having a concave surface on a side facing or opposite to the flash light emitting section, and at a position of the concave lens facing the flash light emitting section, The flash device according to any one of claims 1 to 6, further comprising the rib. ].

According to the eighth aspect of the present invention, the reflected light can be converted to a more effective light flux by the concave lens of the flash panel and guided into the field of view.

According to a ninth aspect of the present invention, the flash panel is a prism lens having a central plane on a side facing the flash light-emitting portion and inclined planes on both sides of the central plane. The flash device according to any one of claims 1 to 6, wherein the rib is provided on a central plane at a position facing the flash light emitting unit. ].

According to the ninth aspect of the present invention, the reflected light can be converted into a more effective light flux by the prism lens of the flash panel and guided into the photographic field angle.

According to a tenth aspect of the present invention, there is provided the method according to any one of the first to ninth aspects, wherein the rib has a taper on both side surfaces for reflecting direct light incident on the rib toward a photographing angle of view. A flash device according to any one of the preceding claims. ].

According to the tenth aspect of the present invention, the direct light incident by the taper on both side surfaces of the rib can be reflected to the photographing angle of view.

According to an eleventh aspect of the present invention, there are provided a flash light emitting section, a flash panel disposed in front of the flash light emitting section, and a reflector for reflecting light from the flash light emitting section toward the flash panel. Wherein the flash panel is a concave cylindrical lens having a concave surface on a side facing the flash light-emitting portion. ].

According to the eleventh aspect of the present invention, the reflected light can be effectively guided into the field of view by the concave cylindrical lens of the flash panel.

According to a twelfth aspect of the present invention, there is provided a camera comprising the flash device according to any one of the first to eleventh aspects. ].

According to a twelfth aspect of the present invention, a camera is provided with the flash device according to any one of the first to eleventh aspects, and has a larger amount of direct light and more reflected light. The guide number for flash photography is improved because it can be inserted into the corner.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a flash device and a camera according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic view of a camera provided with a flash device. The camera 1 is provided with a photographing lens 2 and a flash device 3, and a photographic film 4 can perform flash photography. Assuming that the short side of the exposed portion of the photographic film 4 is L and the focal length of the taking lens 2 is f, this taking lens 2
Is θ1.

The flash device 3 includes a flash light emitting unit 30 and
The flash panel includes a flash panel 31 disposed in front of the flash unit 30 and a reflector 32 that reflects light from the flash unit 30 toward the flash panel. In this flash device 3, the flash emission angle θ2 is set to the shooting angle of view θ1.
Is designed to be approximately equal to

Next, the flash device 3 will be described.

FIG. 2 is a transverse sectional view of the flash device, and FIG. 3 is a longitudinal sectional view of the flash device. The flash device 3 includes a flash light emitting unit 30, a flash panel 31 arranged in front of the flash light emitting unit 30, and a reflector 32 for reflecting light from the flash light emitting unit 30 toward the flash panel.

An Xe tube is used for the flash light emitting section 30 and is arranged in the horizontal direction. Flash panel 31
Has a convex portion 31a on both sides and a convex portion 31b on the upper and lower sides.

The reflecting umbrella 32 is mounted on the flash panel 31 so as to cover the flash emitting section 30.

The flash panel 31 has a rib 31d extending in the direction of the flash light emitting portion at a position facing the flash light emitting portion 30 so as to guide the direct light from the flash light emitting portion 30 within the angle of view. As shown in FIG. 2, the rib 31d has a length W of the flash light emitting unit 30 in the Xe tube axis direction. The rib 31d reflects the direct light incident on the rib 31d on both side surfaces toward the photographing angle of view. Taper 31d1
Having. The direct light that has entered through the taper 31d1 on both sides of the rib 31d is reflected toward the photographing angle of view, so that many light fluxes a can be made effective.

The rib 31d is, as shown in FIG.
At a position facing the flash light emitting unit 30, the rib 31d extends in the flash light emitting unit direction by a length H, and the thickness D1 of the rib 31d is substantially equal to the thickness D2 of the flash light emitting unit 30. Also, a curved surface 31d2 is provided at the tip of the rib 31d.
This curved surface 31d2 has the largest curvature among the curvatures that radiate all of the direct light incident on the rib 31d within the shooting angle of view.

As described above, the thickness D1 of the rib 31d of the flash panel 31 is substantially equal to the thickness D2 of the flash light emitting portion 30, and the direct light c can be converted into a more effective light beam without damaging the reflected light b by the rib 31d. It can be guided to the shooting angle of view as a.

The curved surface 31d2 at the tip of the rib 31d
Has the largest curvature among the curvatures that radiate all of the direct light c incident on the rib 31d from the curved surface into the shooting angle of view, without harming the reflected light b by the rib 31d,
The direct light c can be converted into a more effective light flux a and guided into the shooting angle of view.

The flash panel 31 is a flat lens, and has a rib 31d at a position facing the flash light emitting portion 30 of the flat lens. The flat lens converts reflected light b into a more effective light flux d. It can be guided within the angle of view.

FIG. 4 is a vertical sectional view of another embodiment of the flash device. The rib 31d of the flash panel 31 of this embodiment is formed in the same manner as in the embodiment of FIGS. 2 and 3, but the rib 31d is brought close to the flash light emitting unit 30. The curved surface 31d2 at the tip of the rib 31d may come into contact with the flash light-emitting unit 30, or a slight gap may be brought close to a certain extent. The light c can be directly converted into a more effective light flux a and guided within the angle of view without harming the light b.

FIG. 5 is a longitudinal sectional view of another embodiment of the flash device. The rib 31d of the flash panel 31 of this embodiment is formed in the same manner as the embodiment of FIGS. 2 and 3, but the thickness D1 of the rib 31d is
Is formed shorter than the thickness D2. Rib 31d thickness D
By making 1 smaller than the thickness D2 of the flash light emitting unit 30, it is possible to guide the direct light c into an effective light flux a without harming the reflected light b and within the shooting angle of view. The light flux a made effective by 31d is shown in FIGS.
Is smaller than in the embodiment.

FIG. 6 is a vertical sectional view of another embodiment of the flash device. The rib 31d of the flash panel 31 of this embodiment is formed in the same manner as the embodiment of FIGS. 2 and 3, but the thickness D1 of the rib 31d is
Is formed longer than the thickness D2. Rib 31d thickness D
By making the length 1 larger than the thickness D2 of the flash light emitting section 30, the direct light c can be converted into a more effective light flux a and guided into the shooting angle of view, but is effectively damaged by the inner rib 31d of the reflected light b. The light flux a is smaller than that of the embodiment shown in FIGS.

FIG. 7 is a vertical sectional view of another embodiment of the flash device. The rib 31d of the flash panel 31 of this embodiment is formed in the same manner as the embodiment of FIGS. 2 and 3, but the curved surface 31d2 at the tip of the rib 31d has a small curvature. The rib 31d can convert the direct light c into an effective light flux a and guide it into the angle of view. However, since the curvature of the curved surface 31d2 at the tip is small, the lens effect of the rib 31d is small and the direct light c that can be condensed is reduced. Are smaller than those of the embodiment shown in FIGS.

FIG. 8 is a longitudinal sectional view of another embodiment of the flash device. The rib 31d of the flash panel 31 of this embodiment is formed in the same manner as in the embodiment of FIGS. 2 and 3, but the curved surface 31d2 at the tip of the rib 31d has a large curvature. The rib 31d has a curved surface 31d at the tip.
2 has a large curvature, the end portion P of the curved surface 31d2 is separated from the flash light emitting portion 30, so that the direct light c can be converted into an effective light flux a and guided into the shooting angle of view. Are smaller than those of the embodiment shown in FIGS.

FIG. 9 is a longitudinal sectional view of another embodiment of the flash device. The ribs 31d of the flash panel 31 of this embodiment are formed in the same manner as in the embodiment of FIGS.
The concave lens of the flash panel 31 can convert the reflected light b into a more effective light flux d and guide the reflected light b into a shooting angle of view.

FIG. 10 is a vertical sectional view of another embodiment of the flash device. The ribs 31d of the flash panel 31 of this embodiment are formed in the same manner as in the embodiment of FIGS.
This is a concave lens having a concave surface on the side facing 0, and the width X1 of the upper and lower end portions 32b of the reflector 32 is smaller by Δx than the width X2 of the embodiment of FIG. 9 to reduce the size of the reflector 32.

With the concave lens, the reflector 32 can be made compact without reducing the reflected light irradiated within the angle of view, and the vertical width X2 of the flash panel 31 can be reduced accordingly.

FIG. 11 is a longitudinal sectional view of another embodiment of the flash device. The ribs 31d of the flash panel 31 of this embodiment are formed in the same manner as in the embodiment of FIGS. 2 and 3, but the flash panel 31 has Central plane 3
This prism lens has an inclined plane 31g on both sides of 1f, and has a rib 31d at a position on the center plane 31f of the prism lens opposite to the flash light emitting section 30.
Light b reflected by the prism lens of the flash panel 31
Can be converted into a more effective light flux d and guided within the shooting angle of view.

In this embodiment, as in the embodiment shown in FIG. 10, the size of the reflector 32 can be reduced without reducing the amount of reflected light irradiated within the angle of view.

FIG. 12 is a longitudinal sectional view of another embodiment of the flash device. Flash panel 31 of this embodiment
Is a concave lens having a concave surface on the side facing the flash light emitting unit 30. Although there is a light beam that is wasted by the inner concave lens of the direct light c, it has a light beam d that is made effective by the inner concave lens of the reflected light c. As a result, the reflected light b can be effectively guided within the shooting angle of view.

FIG. 13 is a vertical sectional view of another embodiment of the flash device. Flash panel 31 of this embodiment
Is a concave lens having a concave surface on the side facing the flash light emitting section 30, and the reflector 32 makes the reflector 32 compact as in the embodiment of FIG.

In this embodiment, there is a light beam that is wasted by the inner concave lens of the direct light c, but a light beam d that is made effective by the inner concave lens of the reflected light c. In the same manner as described above, the reflected light b can be effectively guided into the shooting angle of view by the concave lens.

In the embodiments shown in FIGS. 9, 10, 12, and 13, the concave lens has a concave surface on the side facing the flash light emitting unit 30, but is opposite to the side facing the flash light emitting unit 30. Similar effects can be obtained by forming a concave surface on the side.

[0058]

As described above, according to the first aspect of the present invention, the flash panel has the rib at a position facing the flash light emitting portion, and the rib makes the direct light projected from the flash light emitting portion effective. Can be guided within the shooting angle of view.

According to the second aspect of the present invention, the flash panel has a rib at a position facing the flash light-emitting portion, and the thickness of the rib is substantially equal to the thickness of the flash light-emitting portion. The direct light projected from the flash emission unit can be more effectively guided into the shooting angle of view without harming the image.

According to the third aspect of the present invention, the flash panel has a rib at a position facing the flash light emitting portion, and a tip portion of the rib has a curved shape, and direct light projected from the flash light emitting portion is provided. It can be effectively guided within the shooting angle of view.

According to the fourth aspect of the present invention, the direct light can be more effectively guided into the field of view without damaging the reflected light by the rib.

According to the fifth aspect of the present invention, the direct light can be more effectively guided into the field of view by the rib extending in the direction of the flash light emitting portion.

According to the sixth aspect of the present invention, direct light can be more effectively guided into the field of view by bringing the tip of the rib close to the flash light emitting portion.

According to the seventh aspect of the present invention, the flash panel is a flat lens, and the flat lens can convert reflected light into a more effective light flux and guide the reflected light into the field of view.

According to the eighth aspect of the present invention, the reflected light can be converted into a more effective light flux by the concave lens of the flash panel and guided into the photographic field angle.

According to the ninth aspect of the present invention, the reflected light can be converted into a more effective light flux by the prism lens of the flash panel and guided into the field of view.

According to the tenth aspect of the present invention, the incident direct light can be reflected to the photographing angle of view by the taper on both side surfaces of the rib.

According to the eleventh aspect of the present invention, the reflected light can be effectively guided into the field of view by the concave cylindrical lens of the flash panel.

According to a twelfth aspect of the present invention, a camera is provided with the flash device according to any one of the first to eleventh aspects, and has more direct light and more reflected light within a shooting angle of view. The guide number for flash photography is improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a camera provided with a flash device.

FIG. 2 is a cross-sectional view of the flash device.

FIG. 3 is a vertical sectional view of the flash device.

FIG. 4 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 5 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 6 is a longitudinal sectional view of another embodiment of a flash device.

FIG. 7 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 8 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 9 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 10 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 11 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 12 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 13 is a longitudinal sectional view of another embodiment of the flash device.

FIG. 14 is a longitudinal sectional view of a conventional flash device.

FIG. 15 is a longitudinal sectional view of a conventional flash device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera 3 Flash device 30 Flash emitting part 31 Flash panel 31d Rib 32 Reflector

Claims (12)

[Claims] 1. A flash device comprising: a flash light emitting unit; a flash panel disposed in front of the flash light emitting unit; and a reflector for reflecting light from the flash light emitting unit toward the flash panel. The flash device according to claim 1, wherein the panel has a rib at a position facing the flash light emitting unit to guide direct light projected from the flash light emitting unit into an angle of view. 2. A flash device comprising: a flash light-emitting unit; a flash panel disposed in front of the flash light-emitting unit; and a reflector that reflects light from the flash light-emitting unit toward the flash panel. The panel has a rib at a position facing the flash light emitting unit for guiding direct light projected from the flash light emitting unit into a shooting angle of view, and the thickness of the rib and the thickness of the flash light emitting unit are substantially equal. A flash device characterized by being formed to be the same. 3. A flash device comprising: a flash light-emitting unit; a flash panel disposed in front of the flash light-emitting unit; and a reflector that reflects light from the flash light-emitting unit toward the flash panel. The panel has a rib at a position facing the flash light-emitting portion, which guides direct light projected from the flash light-emitting portion into a shooting angle of view, and further has a curved end portion of the rib. Flashing device. 4. A shape of a tip portion of the rib has a maximum curvature among curvatures which radiate all direct light incident on the rib into a photographing screen.
The flash device according to item 1. 5. The flash device according to claim 1, wherein the rib extends toward the flash light emitting section. 6. The flash device according to claim 1, wherein a tip of said rib is arranged close to said flash light emitting portion. 7. The flash panel according to claim 1, wherein the flash panel is a flat lens, and the flat panel lens has the rib at a position facing the flash light-emitting portion. The flash device according to item 1. 8. The flash panel according to claim 1, wherein the flash panel is a concave lens having a concave surface on a side facing or opposite to the flash light emitting portion, and the rib has a rib at a position of the concave lens facing the flash light emitting portion. The flash device according to any one of claims 1 to 6, wherein: 9. The flash panel according to claim 1, wherein said flash panel is a prism lens having a central plane on a side facing said flash light emitting section and inclined planes on both sides of said central plane. The flash device according to any one of claims 1 to 6, wherein the rib is provided at an opposing position. 10. The flash according to claim 1, wherein the rib has a taper on both side surfaces for reflecting direct light incident on the rib toward a photographing angle of view. apparatus. 11. A flash device comprising: a flash light emitting portion; a flash panel disposed in front of the flash light emitting portion; and a reflector for reflecting light from the flash light emitting portion toward the flash panel. The flash device, wherein the panel is a concave cylindrical lens having a concave surface on a side facing the flash light emitting unit. 12. A camera comprising the flash device according to any one of claims 1 to 11.