JPS58129424A - Optical lens - Google Patents

Abstract

PURPOSE:To obtain an optical lens that has function of an aperture or a shutter in itself by providing a pair of electrodes and electricity responding light controlling elements between the electrodes on an optical lens. CONSTITUTION:Transparent display electrodes 12a, 12b, 12c are formed in beltlike form on a lens 11. The film thickness of the display electrodes is 500- 3,000Angstrom . Electricity responding light controlling elements 13a, 13b, 13c are formed on the display electrodes 12a, 12b, 12c. At this time, the light controlling elements are placed between display electrodes in such a manner that the film of a light controlling element which is in contact with an display electrode does not come into contact with the film of a light controlling element provided in contact with the other display electrode. An insulating film 14 is formed over whole face of light controlling elements 13a, 13b, 13c and a facing electrode 15 is provided on it. Electrochromic substance and liquid crystal are used as a light controlling element and those which can be made to thin solid film are suitable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical lens, and more particularly to an optical lens provided with a light control element having functions such as an aperture and a shutter in a photographing optical system of a camera or the like.

Conventionally, diaphragms and shutters in cameras and the like have been designed to set a predetermined diaphragm aperture and opening time based on mechanical operation regulations by placing blades, cloth, etc. as light shielding members in the optical path of field light that has passed through an optical lens. In addition, instead of the mechanical actuation of blades and cloth used in such apertures and shutters, electro-optical materials such as liquid crystals were controlled by electricity. A method has been proposed in which the aperture aperture and aperture time are controlled by operating the aperture.゛However, incorporating such a light control device as a standalone unit into a photographic optical system not only causes defects such as the length and weight of the optical system device itself, but also an increase in the number of parts of the light control device and There are problems with the installation position accuracy of the control device and an extra installation process is required.It is better to use the method of controlling the aperture aperture and aperture time by electrically generating the liquid crystal. Since the electrode is made of a transparent material, it is extremely difficult to position the transparent electrode in the optical path of the field light with high positional accuracy. At present, the aperture shutter has not yet been put into practical use.

An object of the present invention is to provide an optical lens having a light control function that improves the drawbacks of the conventional light control device as described above.

Another aspect of the present invention is to provide an optical lens that has the function of a diaphragm or a shutter.Such an object of the present invention is to provide an optical lens which has a function of a diaphragm or a shutter. This is accomplished by an optical lens with electrically responsive light control elements.

In the optical lens of the present invention, it is preferable to use an electrochemical coloring/decolorizing substance formed into a solid thin film as an electroresponsive light control element. Alternatively, the amount of light transmitted can be controlled by coloring the entire surface.

In the optical lens of the present invention, an electrochemical coloring/decolorizing substance is formed into a thin film between transparent electrodes on the lens, and electricity is distributed therein. It can also be colored by letting it form. Electrochemical extinguishing substances that can be used in the present invention generally include substances such as tandasten oxide, molybdenum oxide, menadium oxide, iridium hydroxide, etc., and mixtures thereof. 〇The method of depositing the solid thin film varies depending on the light control element, but generally vacuum evaporation method and sputtering method are used.

Methods such as the immersion method and the immersion method can be used, and each method can be selected according to the purpose.

In preferred embodiments of the invention, an insulating layer can be provided between the transparent electrode and the electrically responsive light control element. Insulating materials at this time include, for example, zircon oxide, silicon oxide,
Tantalum oxide, magnesium slag, etc. can be used, and thin film formation methods include vacuum evaporation, sputtering, and ion plating! A method such as a Kutsusta ion beam method or a one-dip method can be used. For example, it is also possible to add a 1 ml ivy layer to the display electrode layer to form a multilayer or laminated structure.

In another embodiment of the invention, it is suitable to use a chimatic liquid crystal or a cholesteric liquid crystal as the electrically responsive light control element.

As the electrodes formed in the optical lens of the present invention, it is preferable to use ν especially transparent electrodes. As a material that can form this transparent electrode, tin oxide, indium oxide, or a mixture thereof can be used. Also, if necessary, silver,
It is also possible to use metals such as gold and arsenium for the electrodes.

When the electrode formed on the optical lens of the present invention uses an electrochemical color-developing and decoloring substance as a light control element, the display electrode and the counter electrode can be arranged to face each other, or to distribute power in a three-dimensional manner without facing each other. Alternatively, a pair of electrodes can be formed by distributing power on the same surface of the lens. Furthermore, when a liquid crystal is used as the light control element, it is preferable that a pair of electrodes be arranged three-dimensionally and facing each other for power distribution.

Embodiments of the present invention will be described below with reference to Figure TMK.

1 and 2 are partial sectional views of the optical lens of the present invention. In FIG. 1, 1 indicates one lens in the Kamef mirror-Sonai photographing optical system. There is a lens 11 (shown as a flat surface in the drawing for convenience) and transparent display electrodes 12 m, 12 on top.
% 12• is formed in a band shape. This display electrode 12
”The film thickness of 12b and 12a is generally 500A ~
5000i To L,, Goodt L < Ha2oooKm*
It's tight.

In the simple film configuration as shown in FIG.
2, 15b to the light control element coating 15 on 12.

If only layers 15e are overlapped, there will be areas where light is not blocked. Furthermore, if the light control element is applied over the entire surface, a bleed phenomenon appears and is difficult to control, so it is possible to compensate for the defect. At this time, it is necessary to prevent the coating of the light control element that is in contact with one display electrode from coming into contact with the coating of the light control element that is provided in contact with the other display electrode KIII. For forming a light control element having such an electrode RK field, it is possible to blindly utilize the drop-in phenomenon that occurs during, for example, the electron beam vacuum evaporation method or the X-butter method.

Further, when using, for example, an electric gas material (tungsten oxide, etc.) as the light control element, it is generally preferable that the film thickness is 500X to 500X.

Above the light control element i5m, 15bt 15@, all m
An insulating layer 14 is formed over K. The insulating layer 14 is
It can be a film of 3000 µm to 5000 µm formed of zirconium oxide, entrained madanesium, or the like.

Furthermore, a counter electrode 15 is provided on this insulating layer 14.

Each electrode is electrically connected to an electronic circuit or the like using a lead wire, and in order to form a desired aperture aperture, a voltage or current is supplied between the pair of electrodes to color a desired part of the lens. Can be done. When an electronic material is used as a light control element, coloring can be caused by applying a voltage of ○→0→e, and when a liquid crystal is used, the voltage can be turned on→ By turning it off, you can get excited.

Although the light control element used in the present invention can be formed in multiple layers, such an embodiment can be illustrated in FIG.

In Figure 11 and Figure 2, the display voltage lI2 of the series 1 across the entire WJK of the lens 21 (shown as a flat image in the drawing for convenience)
2 is formed, and a coating 25 of the first light control element is formed in a band shape thereon, and the maximum aperture can be obtained by coloring the coating I [25 of the light control element of this gl.

On the coating 23 of the first light control element, there is a
It has an insulating layer 24 of. Furthermore, the insulating layer 24 of Ill
A first counter electrode 25 is formed in the shape of a strip on top of the Ki.
g2 insulating layer 26. Second light control element coating 27. Fifth
Insulating layer 28. Second display electrode 29. The film 50 of the light control element of iE5 and the insulating layer 51 of II4 are laminated in sequence, and the structure is such that response speed and light shielding properties can be improved.

The winding shown in Fig. ll11 has a concentric or dot tymKwt film for the light control element, and requires only the minimum film configuration for the diaphragm. It is also possible to color or fade any donut-shaped piece. On the other hand, FIG. 2 shows an example in which membranes are produced in accordance with the number of stages of the aperture. When the coating of the light control element is colored in FIG. 2, the effect of the diaphragm can be increased by coloring all the coatings of the light control element located above it.

According to the present invention, it is completely unnecessary to design and manufacture extra parts such as a gaff plate to be incorporated as a light control device, and there is no need to consider the accuracy of the assembly position.
There is no need for a single processing step; only the step of forming a so-called physical element is required, and furthermore, it is possible to form an optical lens with a light control function in the same step as forming an antireflection film on the lens. .

[Brief explanation of drawings]

1vA and 2 are partially cutaway box views of the optical lens of the present invention. 11.21...e lens, 12% 12b, 12
@eas@s Display electrodes, 15a, 15b, 13e
... Coating of fist/electrically responsive light control element, 14...-
- Insulating layer, 15 - pot counter electrode, 22 - 0, 1st
display electrode, 25...O"'@1o electroresponsive light control element, 24. first insulating layer, 25-...
Opposite electrode of meeting 1, 26...--Second insulating layer, 27
#...Fist second electrically responsive light control element coating, 28@
---Sixth insulating layer, 29---Display electrode of IE2,! 10-... Coating of third electrically responsive light control element, 51... O fourth insulating layer. Patent applicant Nakayanon Co., Ltd.

Claims (1)

[Claims] An optical lens comprising a pair of electrodes on the optical lens and an electrically responsive light control element disposed between the electrodes.