JPH0143620Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an optical lens device with a light source direction detector that detects the direction of light received by the surface of an optical lens.

FIG. 1 is a partially sectional side view showing a conventional optical lens device. In FIG. 1, a light source 1 is, for example, the sun, which emits light rays 2. In FIG. The optical lens 3 focuses the light rays 2 emitted from the light source 1 onto a screen 4, which is, for example, a solar cell, and projects an image based on the brightness and darkness of the light. Storage box 5 contains optical lens 3
and the screen 4, and the opening 5
01.

The conventional device is configured as described above, and when it is desired to project an image created by the light rays 2 condensed by the optical lens 3 onto a limited location such as the center of the screen 4, screen 4
It was necessary to see the image reflected on the surface of the Therefore, in the conventional device, an opening 501 is provided in the storage box 5.
, so that the surface of the screen 4 can be viewed, and while viewing the image on the screen 4, the position of the light source 1 can be changed, or the entire storage box 5 can be moved to change the angle of the optical lens 3 that opposes the light source 1. The image was placed in the center of screen 4. Therefore, when the storage box 5 is placed outdoors, the opening 501
Furthermore, there was a disadvantage that the screen 4 was stained and the image was disturbed due to disturbance incident light and water intrusion.

This invention was made in order to eliminate the drawbacks of the conventional ones as mentioned above, and it is said that the optical lens 3
An optical obstacle is provided on the incident side surface of the light source 1, and the optical lens 3 is guided by the light source 1 in the shadow created by this optical obstacle.
It was made to face directly. Embodiments of this invention will be described below with reference to the drawings.

FIG. 2 is a partially sectional side view showing an embodiment of the optical lens device according to the invention, and FIG. 3 is a perspective view showing details of the optical lens and optical obstruction in FIG. 2. In the figure, the same parts as in FIG. 1 are given the same reference numerals. In FIGS. 2 and 3, the optical obstacle 6 is a rod-shaped body 601 made of, for example, plastic, and is attached perpendicularly to the incident side surface 301 of the optical lens 3 by, for example, an adhesive. .

Next, the operation will be explained. Ray 2 from light source 1
is sent to the optical lens 3, the optical lens 3
A rod-shaped body 6 is erected perpendicularly to the incident side surface 301 of
The light ray 2 hits the lens 01, and the shadow of the rod-shaped body 601 is reflected on the entrance side surface 301 of the optical lens 3. By looking at the positional relationship between this shadow and the rod-shaped body 601, the vertical and horizontal directions of the light source 1 can be detected. The optical focal length and focal position of the optical lens 3 and the screen 4 are structurally predetermined, and if the light source 1 is in a specified direction as viewed from the optical lens 3, an image will be projected at the center of the screen 4. Therefore, by appropriately moving the storage box 5 using the shadow of the rod-shaped body 601 reflected on the entrance side surface 301 of the optical lens 3 and aligning the relative orientation between the optical lens 3 and the light source 1 as specified, the image is placed at the center of the screen 4. can be photographed.

FIG. 4 is a perspective view showing another embodiment of an optical lens and an optical obstacle. In FIG. 4, the optical obstacle 6 is made of, for example, plastic and has a cross shape, and includes a cross-shaped body 602 installed parallel to the incident side surface 301 of the optical lens 3, and a cross-shaped body 602 that is placed parallel to the incident side surface 301 of the optical lens 3. The leg portion 603 is supported on the side surface 301.

That is, in the embodiment shown in FIG. 3, the optical obstacle 6 is a rod-shaped body 601, whereas in the embodiment shown in FIG.
The same effects as those of the embodiment shown in the figure can be achieved.

FIG. 5 is a perspective view showing still another embodiment of an optical lens and an optical obstacle. In FIG. 5, the optical obstacle 6 is composed of an auxiliary optical lens, and includes an auxiliary optical lens 604 that focuses on the center of the incident side surface 301 of the optical lens 3, and a leg portion 605 that supports the auxiliary optical lens 604. We are prepared.

Next, the operation will be explained. Auxiliary optical lens 6
The optical focal length and focal position between 04 and the incident side surface 301 of the optical lens 3 are determined in advance and fixed by the legs 605. If there is, the auxiliary optical lens 604 will focus on the center of the incident side surface 301 of the optical lens 3, and an image can be projected at the center of the screen 4.

FIG. 6 is a side view showing the relative relationship between the light source and the optical lens of another embodiment of the optical lens device according to the invention. That is, a plurality of optical lenses 3a
3e respectively facing a single light source 1, each optical lens 3a
Optical obstacle 6a on the incident side surface 301 of ~3e~
By providing 6e, it is possible to perform the same operation as in the embodiment shown in FIG.

In each of the above embodiments, a single convex lens is used as the optical lens 3, but the optical lens 3 may be a single concave lens or a combination of a plurality of lenses. Moreover, when the apparatus is installed outdoors, the optical obstacle 6 can also be used to protect the surface of the optical lens 3 and to threaten birds and animals. Furthermore, the optical obstacle 6 may be configured integrally with the optical lens 3.

As described above, according to this invention, the relative orientation of the optical lens and the light source can be adjusted as specified without looking at the image on the screen inside the storage box, making adjustment easy and preventing the inside of the storage box from getting dirty. It has various effects such as not having any problems.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view showing a conventional optical lens device, Fig. 2 is a partially sectional side view showing an embodiment of the optical lens device according to the invention, and Fig. 3 is a partially sectional side view showing a conventional optical lens device.
FIG. 4 is a perspective view showing other embodiments of the optical lens and optical obstacle; FIG. 5 is a perspective view showing the optical lens and optical obstacle in detail. A perspective view showing still another embodiment,
FIG. 6 is a side view showing the relative relationship between the light source and the optical lens of another embodiment of the optical lens device according to the invention. In the figure, 1 is a light source, 3 is an optical lens, 30
Reference numeral 1 indicates an incident side surface, 6 an optical obstacle, 601 a rod-shaped body, 602 a cross-shaped body, and 604 an auxiliary light source lens. Note that the same parts in each figure are given the same reference numerals.

Claims (1)

[Claims for Utility Model Registration] 1. An optical system comprising an optical lens that condenses light from a light source and an optical obstacle installed on the incident side surface of the optical lens, the light source being illuminated by the shadow of the optical obstacle. An optical lens device with a light source direction detector that detects the direction of the light source. 2. The optical lens device with a light source orientation detector according to claim 1, wherein the optical obstacle is a rod-shaped body installed perpendicularly to the incident side surface of the optical lens. 3. The optical lens device with a light source orientation detector according to claim 1, wherein the optical obstruction is a cross-shaped body installed parallel to the entrance side surface of the optical lens at intervals. 4. The optical lens device with a light source orientation detector according to claim 1, wherein the optical obstacle is an auxiliary optical lens installed to focus on the incident side surface of the optical lens.