JP3027308U - Combination structure of biconvex lens and plane mirror - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is intended to observe a dramatically magnified erect and virtual object image by a combination of a biconvex lens and a plane mirror. The present invention comprises a combination of a biconvex lens and a plane mirror which is arranged close to the one spherical surface of the biconvex lens and which is arranged so as to intersect the optical axis of the biconvex lens almost perpendicularly. [Effect] By such a combination of the biconvex lens and the plane mirror of the present invention, an object standing upright on the optical axis within the focal length of the other spherical surface of the biconvex lens is dramatically enlarged and is an erect and virtual image object. This is a combined structure of a biconvex lens and a plane mirror, which is characterized in that it can be observed as an image.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, by combining a biconvex lens and a plane mirror, an object standing upright on the optical axis within the focal length of the other spherical surface of the biconvex lens can be observed as an erect and virtual object image that is dramatically enlarged. To do so. (The flat mirror referred to here is one in which a reflective surface is provided on the back surface of a transparent, flat plate glass, etc.)

[0002]

[Prior art]

 Conventionally, there has been a system in which a plano-convex lens section is provided side by side with a part of the plane mirror, and a part of the virtual image transmitted inside the plane mirror is slightly magnified and observed.

[0003]

[Problems to be solved by the device]

 However, the conventional plano-mirror with a part of the plano-convex lens part is much longer than the bi-convex lens with the same radius of curvature, and the magnifying power of the virtual image is extremely high. There were low drawbacks.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention uses a combination of a biconvex lens and a plane mirror that closely faces the one spherical surface of the biconvex lens and that intersects the optical axis of the biconvex lens approximately perpendicularly to the other spherical surface of the biconvex lens. This is a combination structure of a biconvex lens and a plane mirror, which is characterized in that an object standing upright on the optical axis within the focal length on the side can be observed as a dramatically magnified upright, virtual object image.

Referring to the drawings in more detail, the combined structure of the biconvex lens and the plane mirror of the present invention shown in FIG. 1 is closely opposed to the biconvex lens 1 and its one spherical surface, and the biconvex lens 1 An object AB standing upright within the focal length closer to the biconvex lens 1 than the focal point 4 on the optical axis 2 on the other spherical surface side of the biconvex lens 1 by combination with the plane mirror 3 provided so as to intersect the optical axis 2 almost vertically. Is an extension line of the reflected ray CD reflected from the head A to the intersection C of the plane mirror 3 and the optical axis 2 at a reflection angle equal to the incident angle of the plane AC to the plane mirror 3, the focal point 4 and the object. A ₁ B ₁ vertically descending on the optical axis 2 from the intersection A ₁ of the ray 4A connecting the head A of AB with the extension shown in the figure is a dramatically enlarged, erect, virtual image object What can be observed as image A ₁ B ₁ is shown in the drawing. .

FIG. 2 is an example of a drawing in which a plano-convex lens portion 6 is provided in a part of a conventional plane mirror 5 so that the magnifying power of a virtual image is extremely low.

[0007]

[Effects and examples]

 In such a combination structure of the biconvex lens and the plane mirror of the present invention, an outer peripheral frame also serving as a reinforcement is provided for both the biconvex lens 1 and the plane mirror 3, and the inner frame or the outer side of the outer frame of the biconvex lens 1 is provided. The outer frame of the plane mirror 3 to be fitted can be attached / detached, or both frames can be rotated by a pin shaft connection or a hinge connection so that they can be rotated. It is also convenient to use them or to use them individually as a magnifying glass or a plane mirror.

[Brief description of drawings]

FIG. 1 is a drawing showing that an object AB having a combination structure of a biconvex lens and a plane mirror according to the present invention can be observed as a dramatically enlarged, erect and virtual object image A ₁ B ₁ .

FIG. 2 is an example of a drawing in which a plano-convex lens unit is provided in a part of a conventional plane mirror and the magnification of a virtual image is extremely low.

[Explanation of symbols]

1 biconvex lens 2 optical axis 3, 5 plane mirror 4 focal point 6 plano-convex lens part AB object A ₁ B ₁ dramatically erect and virtual object image C, A ₁ intersection AC, 4A ray CD reflected ray

Claims (1)

[Scope of utility model registration request] 1. A combination of a biconvex lens (1) and a plane mirror (3) provided so as to closely face and face one spherical surface of the biconvex lens (1) and to intersect the optical axis (2) of the biconvex lens (1) substantially perpendicularly. An object image (A ₁ B ₁ ) of an upright virtual image in which the object (AB) standing upright on the optical axis (2) within the focal length on the other spherical surface side of the biconvex lens (1) is dramatically enlarged by the adjustment. It is a combination structure of a biconvex lens and a plane mirror that can be observed as.