JPS5853105A - Spotlight - 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 This invention relates to spotlights used, for example, in studios during performances.

Conventionally, there is a spotlight called an ellipsodal spot. This spotlight is effective when illuminating areas that are separated by a long distance, and it is impossible to do so by illuminating a part of the irradiation circle, and when using it for such purposes, other equipment must be used. The number of instruments owned increases, making handling inconvenient and uneconomical.

This invention was made in view of these points, and provides a spotlight that can provide sharp illumination with a clear outline of the irradiation circle using a single device, and can also freely change the degree of blurring of the outline of the irradiation circle. The purpose is to scale.

In this invention, a light emitting lens is arranged in front of a light source, a mirror is arranged in the rear part, a clear diffuser plate is provided between the light source and the light emitting lens, and this diffuser plate is deflected to emit light. The diffusion rate! ! #
! iEL, therefore, provides sharp illumination with a clear outline of the irradiation circle, and also varies the degree of blurring of the outline of the irradiation circle, so that a variety of lighting effects can be obtained with a single device.

A first embodiment of this invention will be described with reference to FIGS. 1 to 3. (1) is a cylindrical housing. This case (1)
A halogen lamp (2), which is a light source, is installed at the rear of the mirror, positioned at the center of a spherically concave mirror (3), and in front, two projecting lenses (4) and (5) made of plano-convex lenses are arranged so that each other has a spherical surface. are arranged facing each other in the front and rear direction.

Further, the front opening KIfi of the housing (1) is formed with a frame (6) into which a color filter (not shown) is inserted, and the side is provided with a handle (7) for installing the housing (1) in a predetermined location. It is being

Next, the housing (1)K is provided with an iris shutter (8). - The blades (9) of this iris shutter (8) are formed of a clear diffuser plate, and these blades (9) are used to prevent light from flowing between the light projecting lens (5) and the halogen lamp (2). The area through which light passes is arbitrarily opened or closed near the focal point of the lens (5).

In such a configuration, when the iris shutter (8) is fully opened, the light reflected from the halogen lamp (2) at the (2) (3) is projected. Lens (5) (4) Light is projected while condensing K. At this time, the outline of the irradiation circle is clear and the third
As shown by the solid line in the figure, illumination with sharp light distribution characteristics can be obtained. When the diffusion rate of the iris shutter (8) is increased by the aperture P blades (9), that is, the diffusion plate, the reflected light from the Mi 9-(3) is diffused by the diffusion plate, and therefore the contour of the light projection range is changed. As shown by the dotted line in FIG. 3, illumination with blurred light distribution characteristics is obtained.

Furthermore, the diffusion rate can be arbitrarily set by adjusting the aperture of the iris shutter (8), and therefore the light distribution characteristics can be changed freely.

Next, a second embodiment of the present invention will be explained with reference to FIG. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, a rotating shutter is installed in the housing (1) K using a clear diffuser plate, and this rotating shutter (10
The shaft <In fixed to is rotatably held on the side surface of the casing (1), and furthermore, one end of this shaft (11 protrudes outside,
A knob (not shown) is fixed to the protruding end.

Therefore, as shown by the solid line, when the rotary shutter is closed, the reflected light from the mirror (3) is diffused by the rotary shutter ring, ie, the diffuser plate, and is projected, so that the outline of the irradiation circle becomes blurred. Conversely, sharp illumination can be obtained by fully opening the rotary shutter (G) as shown by the dashed line. An intermediate lighting effect can be obtained by using a rotating shutter (10) whose opening is arbitrarily adjusted and the diffusion rate by the diffuser plate is varied.

Since this invention is configured as described above, the light diffusion rate is changed by a clear diffusion plate provided between the projection lens and the light source, and sharp illumination with a clear outline of the irradiation circle and the outline of the irradiation circle are achieved. It is possible to perform a wide variety of lighting and intermediate lighting, and therefore, a variety of lighting can be performed with a single device, the number of devices to be owned can be reduced, and handling can be simplified and economical efficiency can be improved. It has the following effects.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing the first embodiment of the present invention, the second figure is a front view of the iris shutter, the third figure is a graph showing its light distribution characteristics, and the fourth wA is the second embodiment of the present invention. FIG. 1-... Housing, 2... Halogen lamp (, til),
3-・Mirror, 4~! S...projection lens, 9-blade 11
(clear diffuser plate), 10...Rotating shutter (clear diffuser plate) Applicant: Toshiba Electric Materials Corporation

Claims (1)

[Claims] A light projecting lens is provided at the front of a cylindrical casing containing a light source, and a light projection lens is provided at the rear, and by shifting the casing to an arbitrary position, the blurring of the periphery of the irradiation circle can be varied. A spotlight comprising a clear diffuser plate positioned between the light source and the projection lens.