JPH01248121A - Uniaxial driving type multidegree of freedom relay optical system - Google Patents

Abstract

PURPOSE:To easily deflect an optical axis on a multidegree of freedom basis by swinging swing plane mirrors which are arranged in different places around oscillation axes. CONSTITUTION:While 1st and 2nd uniaxial swing plane mirrors 5 and 6 for direction control are installed so that oscillation axes 5a and 6a cross each other at right angles, 3rd and 4th uniaxial swing plane mirrors 7 and 8 for position control are provided to that oscillation axes 7a and 8a cross each other at right angles. When the swing plane mirrors 5 and 6 are swung around the oscillation axes 5a and 5b, the direction of the optical axis of the projection light from a reference point F can be deflected between two axial directions. When the swing plane mirrors 7 and 8 are swung around the oscillation axes 7a and 8a, the position of the optical axis of the projection light from the reference point F can be deflected between two axial directions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application j] The present invention relates to a one-drive type multi-degree-of-freedom relay optical system.

[Prior art] A relay optical system changes the position S of the light ray emitted from the optical system toward the eyeball when the position or orientation of the eyeball changes due to light without changing the state of the light ray. It is necessary to change either the horizontal direction or both directions, and in order to change it in two degrees of freedom, it is necessary to drive the plane mirror for changing the optical path on two axes.

Conventionally, a gimbal mechanism or the like was usually used to perform two-axis 1 lil movement of such a plane mirror.
Due to its use, the moment of inertia of the 01 moving parts tends to be too large, making it difficult to drive at high speeds.

[Problems to be Solved by the Invention] An object of the present invention is to provide a relay optical system that uses a cymbal mechanism or the like.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an optically equivalent input side in a relay optical system that transfers a light beam to distant positions within 7 degrees in the same state. A plurality of condensing points that converge at least one of the average human radiation beam and the condensed incident beam between the reference point of
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It is characterized by Noh and 1 no Kata.

[Function] A plurality of oscillating plane mirrors arranged at different locations are used. [Embodiments] Below, embodiments of the present invention will be described in detail with reference to the drawings.

Figures 1 (A), (B), and (C) show a relay optical system that is the basis of the uniaxially driven multi-degree-of-freedom relay optical system of the present invention, and is composed of four convex lenses 1 to 4. Ori,
Figure (A) shows a case where the incident light and the output light at optically equivalent reference point A on the entrance side and reference point F on the exit side, which are set in the optical path, are parallel beams. B) shows the case where the incident light and the emitted light are condensed beams condensed at the reference points A and F, respectively, and FIG.
2 shows the positional relationship between each of the lenses 1 to 4 and the focusing points A to F of the parallel beam and the focused beam. On the other hand, FIG. A uniaxial swing plane mirror 5 with mutually different swing axis directions is provided at the light spot.
8 are arranged respectively, and the position and direction of the optical axis of the emitted light exiting from the reference point F on the exit side can be varied with multiple degrees of freedom by swinging these plane mirrors. . That is, the reference point A is set in front of the first lens 1 on the optical path by a length 2f that is twice its focal length f, and this reference point A is in a conjugate relationship with the first lens 1. At point C, the first and second uniaxially swinging plane mirrors 5 and 6 for direction control are installed so that the swinging axes 5a and 8a are orthogonal to each other, and the mirrors are placed behind the first lens 1 by the focal length af. The third and fourth uniaxially swinging plane mirror frames for position control are shown at the conjugate point D of the located point B with respect to the second lens 2, and the conjugate point E of this point with respect to the third lens 3. .

In the uniaxially driven multi-degree-of-freedom relay optical system having the above configuration, when the first and second oscillating planes m5 and 6 are oscillated around the oscillating axes 5a and 8a, respectively, FIG. As shown, the direction of the optical axis of the emitted light exiting from the reference point F can be made to swing in two axial directions, and the third and fourth
When the oscillating plane mirrors 7 and 8 are oscillated around the oscillating wheels 7a and 8a, respectively, as shown in FIG. can be made to swing.

Therefore, when this -axis-driven shape degree-of-freedom relay optical system is used to measure eyeball accommodation or eye movement, even if the position or orientation of the eyeball changes, the relay optical system will direct the eyeball toward the eyeball accordingly. It can also be installed in a different position from the above-mentioned case by injection. That is, FIG. 4 shows another embodiment of the present invention. In this embodiment, the point C in the relay optical system of FIGS. 1(A) and (B) and the $2 lens at this point C are The first and second uniaxially swinging plane mirrors 5 and 6 for direction control are installed at the conjugate point G regarding 2, so that the swinging axes 5a and 6a are orthogonal to each other, and the third and fourth uniaxially swinging plane mirrors for position control are installed at the conjugate point G for position control. The uniaxially oscillating plane mirror 7.8 is installed at the conjugate point and E with respect to the third lens 3 so that its oscillating axes 7a and 8a are orthogonal to each other, as in the first embodiment.

In this second embodiment as well, by swinging each of the swinging plane mirrors 5 to 8, it is possible to swing the position and direction of the optical axis of the emitted light in two axial directions. can.

In this case, it is sufficient to provide only a swinging plane mirror for position control or direction control.

[Effect of the Invention 1] As described above, according to the present invention, by performing uniaxial control in mutually different directions at a plurality of optically equivalent points, it is possible to swing the optical axis with multiple degrees of freedom.

[Brief explanation of the drawing]

FIG. 1(A) is a perspective view showing a state in which a parallel incident beam is transferred in the relay optical system that is the basis of the uniaxially driven multi-degree-of-freedom relay optical system of the present invention, and FIG. 1(B) is a perspective view of the same relay optical system. Fig. 2 is a perspective view showing the state in which the condensed incident beam is transferred in the relay optical system; 1 is a perspective view of the first implementation. 5.8, 7.8 ...-axis swinging plane mirror, 5a, 8a, 7
a, 8a... Swing axis, A, B, C, D, E, F, G,
··point. designated agent

Claims (1)

[Claims] 1. In a relay optical system that transfers light beams in the same state to separate positions in space, parallel incident beams and condensed incident beams are formed between the optically equivalent reference point on the input side and the reference point on the exit side. Uniaxially oscillating plane mirrors with different oscillating axis directions are arranged at multiple locations of the condensing point where at least one of the beams is condensed, and the oscillation of these plane mirrors causes the beam to move away from the reference point on the exit side. A uniaxially driven multi-degree-of-freedom relay optical system characterized by being able to control the optical axis of emitted light with multiple degrees of freedom.