JPS61272702A - Solar concentrator - Google Patents

Abstract

PURPOSE:To conventrate solar light effectively over a long period by arranging plural lens bodies each of which has a shape obtained by cutting off a spherical lens between two meridians like a plate on an arc-like plane having a radius around the focus F of the lens bodies in the thickness direction of the lens bodies. CONSTITUTION:Plural lens bodies each of which has a shape obtained by cutting off a spherical lens between two meridians like a plate are arranged like a circular arc having a radius around the focus F of respective lens bodies 1 in the thickness direction of the lens bodies so that the arc-like arrangement of the lens bodies 1 is directed in the east-west direction. While changing the lens bodies 1 for converging solar light S into the focus F part successively one by one from the east to the west, the solar light S can be surely concentrated into an extremely narrow range of the focus F part.

Description

[Detailed description of the invention] The present invention relates to a solar light concentrating device for concentrating sunlight.

(Problems to be solved by the prior art and the invention) For example, when concentrating sunlight to illuminate a dark room or the north side where there is no sunlight, conventionally a parabolic reflector or a single-layer convex lens was used for the condensing part. Then, the focused light was introduced through an optical fiber cable and diffused again to illuminate the dark place, but with either method, an independent tracking device was required because the position of the sun changed over time. .

Furthermore, since parabolic reflectors and convex lenses use a single optical system to focus light beams into a point, delicate precision is required in terms of position and orientation relative to the sunlight and the focal point, making the entire device complex. Ta.

The present invention is capable of effectively concentrating sunlight for a long period of time without requiring a special tracking device, and the entire device can be easily constructed.

(Means for Solving the Problem) The technical means of the present invention for solving this technical problem is such that a plurality of lens bodies 1 each having a shape of a plate cut from a spherical lens between two meridians are They are arranged in an arc shape in the thickness direction with a radius centered on the focal point F of the body 1.

(Function) By arranging the lens bodies 1 so that the direction in which they are arranged in an arc shape faces east and west, a special tracking device is not required.
Although the condenser lens body 1 that condenses light changes one by one from east to west, sunlight can be reliably condensed in an extremely narrow range for a long time.

(Example) Hereinafter, the present invention will be explained according to the illustrated example.
In the figures and FIG. 2, reference numeral 1 denotes a lens body, which is made of transparent and heat-resistant synthetic resin such as polymethyl methacrylate, polycarbonate, diallyl carbonate, etc., and as shown in FIG. It has the shape of a thin plate cut between two meridians. This lens body 1
There are a plurality of lenses, and they are arranged in a circular arc shape in the thickness direction with a radius centered on the focal point F of each lens body l.

According to the configuration of the above embodiment, when the lens bodies 1 are arranged so that the direction in which they are arranged in an arc shape faces east and west, the direction of incidence of the sun's rays changes due to the diurnal movement of the sun, so that the sun's rays S become light. The lens body 1 in the axis 0 direction changes one by one from east to west, but the optical axis 0 direction -
To ensure that solar rays incident at an angle approximate to the focal point F are focused. Furthermore, since the lens bodies 1 are arranged in an arc shape with a radius centered on the focal point F, the lens bodies 1 with sunlight in the optical axis direction remain for a long time.

Therefore, the lens body l that focuses the sunlight S on the focal point F
Even though the number of solar rays changes one by one from the bundle to the west, the sunlight S can be reliably focused in an extremely narrow range of the focal point F.

Therefore, for example, when converting solar energy into electrical energy and thermal energy using a solar cell, it is only necessary to provide a solar cell 4 as shown in FIG. 2 near the focal point F, and each lens body 1 The concentrated sunlight can be efficiently received by the small solar cell 4 and used effectively. Furthermore, in the case where the sunlight S is received by an optical fiber and used for illuminating a dark place, etc., the light-receiving part of the optical fiber 5 may be provided only in the vicinity of the focal point F, as shown by the chain line in Fig. 2. , it has become possible to use solar energy efficiently and consistently with a simple device, and its effects are significant.

In the above-mentioned embodiment, a plurality of lens bodies 1 are arranged in an arc shape in the thickness direction, but instead of this, a plurality of lens bodies 1 are arranged in a plurality in the thickness direction as shown in FIG. The condensing devices arranged in an arc shape may be integrally molded.

(Effects of the Invention) According to the present invention, a plurality of lens bodies 1 each having a shape obtained by cutting a spherical lens into plate shapes between two meridians,
Since the lens bodies 1 are arranged in an arc shape in the thickness direction with a radius centered on the focal point of Sunlight can be focused in a narrow area over a long period of time. Therefore, for example, solar energy can be reliably received by a small solar cell or an optical fiber with a small light-receiving surface, and the light energy can be used very efficiently as electrical energy, thermal energy, or lighting with a simple device. Furthermore, since the condensing lens device has thin plate-like lens bodies 1 arranged in parallel in the thickness direction, it can be formed as small as a single convex lens, and can be easily manufactured and provided at low cost. , its practical effects are significant.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with the first figure being a perspective view and the second figure being a perspective view.
FIG. 3 is a side sectional view, FIG. 3 is a perspective view of the lens body, and FIG. 4 is a side sectional view showing another embodiment. l...Lens body, 2...Spherical lens.

Claims (1)

[Claims] 1. A plurality of lens bodies 1 each having a shape obtained by cutting a spherical lens into plate shapes between two meridians are arranged in an arc shape in the thickness direction with a radius centered on the focal point F of each lens body 1. A condensing lens device characterized by: