JPS59229538A - Local illumination light changeable in projection pattern - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a local illumination light for photography that utilizes a dual filament bulb such as that disclosed in U.S. Pat. No. 2,005,194 and U.S. Pat. By selectively switching on filaments at various distances from the reflector, the position of the light can be adjusted.
It is possible to selectively change the pattern of light incident from the light onto the object on the surgical table into a spot beam and a flat beam without change.

In specialized local lighting used in photography, it is often desirable to be able to fully adjust the size of the light pattern projected onto the subject based on the particular subject being photographed and/or the method of photography.

A conventional means of changing focus and/or changing pattern size is to move the bulb entirely mechanically relative to the reflector of the optical system. This consists of initiating the entire physical movement of the light source using a lever usually located on the light itself. Since this member is generally located on the local illumination light itself, which is located at a distance from the camera,
Each time the photographer changes the pattern size, he must either leave the camera and operate the lever himself, or he must instruct an assistant to operate the lever. Therefore, such focusing means are inconvenient. Remotely controlling the focusing requires attaching a very cumbersome motor drive to the light.

The present invention provides a means for controlling the pattern size and/or focusing of local illumination lights without the need for mechanical movement of such lights, thereby facilitating remote operation and control. It is.

FIG. 1 shows a typical photographic local illumination light according to the invention. In this specification, two controlled rc
It is described as using a light bulb with one or more filaments.

This design takes into consideration a double filament enclosed within a small tube. Previous designs have relied on various standard incandescent bulbs, which suffer from bulk, low luminous intensity, and short lifespan. The light bulb used in the present invention is a low voltage, frosted type that uses multifilament technology to overcome these problems. Furthermore, the small tube that is assembled therewith is close to a point light source, and when used in a multi-reflection system, it is possible to select a wide range of patterns and focusing states. The curvature of the reflector is parabolic, and the filament is placed between the reflector and the focal point of the reflector, so that the light rays are focused to a certain point.

By energizing one or the other of the filaments, the focusing state and thus the pattern size can be changed electrically. As a side effect to this configuration,
If the filament burns out during photography, the light can be switched to another filament, eliminating the need for backup lighting equipment in case the filament burns out.

The light assembly may include one or more multifilament bulbs within the assembly.

Therefore, by switching on the rearmost filament of a multifilament light bulb and turning on the light bulb, a small pattern of high brightness can be obtained. By switching on other filaments and switching on different bulbs, patterns of greater brightness can be formed. This design is opposed to multi-set systems in which the size of the superimposed constant projection and pattern from successive light bulbs is reduced by switching on the light bulbs. In this case, the brightness is reduced as the pattern becomes smaller.

There can be more than one filament (1) in any bulb. Therefore, the purpose of use can be expanded to a large number of patterns.

The local illumination light of the invention is used in the field of photographic illumination. The two main types of lighting used by photographic technicians are six-flat and "spot". Currently, photographers must purchase two separate light bulbs for these two uses and then have to replace these IT bulbs when lighting conditions or subject matter change.

When a basic light bulb has two filaments separated by a practical distance, it can be electrically switched from spot to 7 rad and back to spot. Accordingly, a means for electrically switching the bulb from 6-flat to 1-spot for maximum flexibility in photographic lighting is also disclosed herein.

It is an object of the present invention to provide an improved local illumination light for photography.

Another object of the invention is to provide a means for fully electrically controlling the pattern size of a photographic light by using a multifilament light bulb having suitable means for full actuation of one filament or another filament. be. A means is provided to change pattern size by remote control without the need for physical contact with the light itself.

Another object of the present invention is to provide a multi-filament light bulb that provides illumination whose pattern size and/or focus state can be electrically varied without the need for any mechanical moving parts, and at the same time makes this light bulb automatic. This can be done by connecting to a brightness controller and adjusting the brightness in proportion to the pattern size, so that when the pattern size is changed, the illumination brightness can be automatically maintained at a constant level.

Another object of the invention is to provide a fully electrically adjustable focusing state and/or pattern size and to switch to another filament (and simultaneously another pattern) in case of failure of a constituent filament. To provide a multi-filament light bulb with redundancy so that

Another object of the invention is to use a light bulb with two or more filaments arranged perpendicular to the optical axis of the light, and to energize one or more of the filaments at the same time for special photography purposes. The object of the present invention is to provide a means for giving a special pattern to the image.

Another object of the invention is to provide a photography light bulb that can be refocused by simply switching on another filament.

Another object of the present invention is to provide a photographic light [1-
It is to provide.

Another object of the invention is to provide an entire light bulb consisting of an assembly of bulbs, some of which are multifilament bulbs.

In order to achieve the above-mentioned and other objects, the present invention consists of a combination of the component parts as hereinafter described in detail, as shown in the accompanying drawings, and as specifically claimed in the claims. However, changes may be made in form, size, proportions, and structural details without departing from the scope of the invention or sacrificing all of its advantages. I want to be understood.

Hereinafter, the present invention will be described in detail with reference to all the accompanying drawings.

Local illumination light 1 for photographic technology according to the invention as shown in FIG.
0 has a housing 11 supported on a suitable bracket. Although the light shown in FIG. 1 is a multi-armor plate type light, it may also be a single reflector type light. Housing 1
1 fully supports the first source reflector 12, the light bulb 12', the second reflector 16, and the reflector 14 of O6, and has a handle 17.
is attached to the housing by a suitable structure. The source reflector 12 has a focal point 20 and an axis of symmetry 42, as will be understood by those skilled in the art. The filament, which is a suitable light emitting source, is preferably spaced from the focal point of the reflector plate 12. Reflector 1
2.13 and 14 may have flat reflective surfaces, light dispersion type reflective surfaces, or faceted surfaces. The light bulb 12' includes a first light source 15 and a second light source 1.
6, but it is also possible to include 6 or more light emitting sources. The light emitting sources 15 and 16 are filaments or any suitable I/O light emitting device used in light emitting devices well known to those skilled in the art.
These light emitting sources are generally referred to herein as filaments. Tungsten halogen fillers have been found to be a desirable type of filament. This is because its size is compact and two or more eyes, separated by a controlled distance from each other, form almost a point source of light. The first light source 15 is spaced 7 from the first reflector 12 between the reflector 12 and the focal point 20 and is spaced apart from the second light source 16 . This second filament 16
is shown spaced apart from the first filament 15 and focal point 20.

The multifilament light bulb 12' has a frosted glass bulb in order to obtain a pattern without voids or shadows and to eliminate the shadow of the filaments on the pattern field pJi. In order to maximize the desired light diffusion, a transparent light bulb can also be used with a light reflector 12 and/or various stepped Fresnel lenses.

Handle 17 is a removable handle of the type well known to those skilled in the art, which is grasped by the photographer's hand to adjust the local illumination light to the desired position.

When the 2.1 filament 15 of the local illumination light of FIG.
It is reflected at 27.28 and 29, and hits the object to be photographed with a large pattern size. When the second filament 16 is energized, this filament 1
The rays from 6 are reflected via paths 31, 62 and 33t to provide an original pattern of small size 'km on the shadow object.

In addition, it is also possible to create patterns in between, smaller sizes, or even larger patterns by energizing another filament, but selectively by energizing 15 or 16 filaments You can get different sizes of light (turn vi-).

In the embodiment of the invention shown in FIGS. 2-5, the ? A local illumination light 110 formed of two elements 111.112.113.114.115 and 116 is shown. The yoke 119 is mounted 9 to a suitable support surface, such as a wall W or a ceiling C above a surgical table T. An object such as a patient is placed on the operating table T. Light elements 111 to 1
16 each has a reflective plate 120.

This reflector 120 is concave and, according to good lighting techniques, has a focal point 126tl-. A matte or clear or color corrected lens 122 is provided.

Each of the light elements 111 to 116 has a light bulb 121, which by way of example includes a plurality of filaments 123.12 spaced apart from a focal point 126 and spaced apart from each other.
4 and 125. Each of the light elements 111 to 116 can have two or more filaments - and is shown with these filaments by way of example. The filaments 123 and 124 are spaced apart from the focal point and reflector by separate distances along the axis of symmetry 142, and the reflector 120 is such that when the filament 124 is energized, the light rays are relatively high in intensity on the object being photographed. The target is oriented to form a small pattern 128. When a pattern of small size is desired, only a portion of the filament 124 needs to be energized.

This is because if the size of the pattern is small, only a fraction of the light beam is needed to create a pattern of the same brightness.

When the filaments 126 of the light are energized by closing the switch 82t, they direct a beam of light onto the object in a relatively large pattern shown at 127 and direct a high intensity light to this large pattern area 127. To provide the pattern, the other filaments of the bulb are energized, for example by switch 53t--closed.

The local illumination light 110 may be provided with any suitable number of light elements, and the light elements 111-116 may be supported in any practical configuration, or any practical number of lights may be provided in any desired manner. pattern, where each light is configured with multiple filaments and each light reflector is directed to the same area on the object on the surgical table, with light elements 111-116 are arranged around the axis of line symmetry 142, respectively.

These lights can be used as photographic lights, and in some applications requiring a highly focused state of color or a pattern size of color.

Dual filament bulbs can be used in multi-bulb configurations with another single filament or multifilament bulb to provide patterns of varying sizes from large diameter flood effects to small diameter spot effects. Additionally, combination flood/spot equipment exists that simultaneously provides secondary spot illumination for large exposure patterns. In this way, it is possible to illuminate the entire object over a wide area while providing high illumination to a small specific part of the object.

Changing from full flood or full spot to a flood/spot combination can be accomplished by selectively electrically energizing the appropriate filaments.

Although the foregoing description describes the invention in its preferred practical form, it will be understood that the structures shown may be modified to the extent equivalent thereof without departing from the scope of the invention. .

[Brief explanation of drawings]

Figure 1 is a front view showing a local illumination light with a multi-filament light bulb according to the present invention, Figure 2 is a side view showing an assembly of multi-filament light bulbs, and Figure 6 is shown in Figures 2 and 2. A top view of the bulb assembly shown; Figure 4 is a schematic diagram showing the lights of Figures 2 and 6 with the bulbs arranged to form a small 116 bright light pattern; Figure 5 is a diagram showing the entire large lighting pattern. 2 and 6 energized to do so, and FIG. 6 is a wiring diagram illustrating an example of switching connections to multiple filaments. 10, 110, 110'... Local illumination light 11
...Housing 12.13,14...Reflector 12'...Light bulb 15.16...Filament 17...Handle 20...Focus 111.112,113,114,115°116.・
・Light element 117...) -me 118...bracket 119...yoke 120...reflector 121...basket row (123, 124, 125...filament 126...
·focus

Claims (1)

Claims: A local illumination light used in photography to provide flood and spot light beams, said light comprising:
a reflector having a symmetry axis and a focal point, a first light emitting source and a second light emitting source;
A light emitting source, and a means for selectively connecting an energy source to the first and second light emitting sources, wherein the first @ light source and the second light source select one light emitting source more than the other light emitting source. the first light emitting source and the second light emitting source for the energy source, the first and second light emitting sources being close to a reflector and supported in a spaced apart relationship with respect to the reflector and with each other; 2 Spot and flood rays (f) can be selectively directed at the photographic subject while the light source remains fixed, allowing the light to be moved from the flood ray to the object for maximum flexibility in photographic illumination. A local illumination light for photographic technology, fully characterized by being provided with means for switching to a spot beam.