JP2010049111A - Eyecup for eyepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an eyecup for an eyepiece, which also corrects astigmatism. <P>SOLUTION: In the eyecup 4, an astigmatism correction lens 6 is attached to its inside, thus an operation can be carried out with astigmatism corrected by the astigmatism correction lens 6. This enables an operator to observe an operation field more sharply, and reduces the operator's fatigue. In addition to the astigmatism correction lens 6, various optical filters or a diopter lens may be provided on the eyecup 4. This eyecup can be used in other optical devices, such as an astronomical telescope and binoculars, besides a microscope 1 used for an operation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an eye cup for an eyepiece.

  An eye cup is provided in an eyepiece portion of an optical device such as a telescope, binoculars, and a microscope to block an external light by bringing an observer's eyes into close contact. The eye cup can be expanded and contracted with respect to the eyepiece by, for example, screwing into one end of the eyepiece and rotating. This type of eye cup has a general shape with a rubber provided on the eye contact portion, and an eyepiece, a cover glass, a diopter adjustment lens, and the like are attached inside.

When the diopter adjustment lens is attached, myopia and hyperopia can be corrected, so that an operator wearing normal glasses can also remove the glasses and observe the eyepiece. If the glasses are removed, the external light does not enter the inner surface of the glasses, and the eyepiece can be observed in a state where the external light is completely blocked by the eye cup (for example, see Patent Document 1).
JP 2005-17402 A

  However, in such a conventional technique, the diopter adjusting lens attached to the inside of the eye cup can correct myopia and hyperopia, but if the surgeon has astigmatism, it can correct it. There wasn't. In particular, when fine surgical operations such as neurosurgery are required, accurate surgery cannot be performed unless the astigmatism is completely corrected. It was. For this reason, external light enters the inner surface of the glasses, and the external light blocking performance of the eye cup itself is hindered.

  The present invention has been made by paying attention to such a conventional technique, and provides an eye cup for an eyepiece that can correct astigmatism.

  The invention described in claim 1 is an eyepiece for eyepiece attached to one end of the eyepiece of the optical device, characterized in that an astigmatism correcting lens is attached inside.

  The invention according to claim 2 is characterized in that it is screwed into one end of the eyepiece and rotated to be retractable with respect to the eyepiece.

  The invention described in claim 3 is characterized in that the astigmatism correcting lens is held in a cylindrical holder, and the holder is detachably screwed to the eyepiece eye cup.

  According to the first aspect of the present invention, the astigmatism correcting lens is attached inside the eyecup, so that an astigmatism observer can also observe with the glasses removed. Since an astigmatic observer can also observe with the glasses removed, the external light does not enter the inner surface of the glasses and can be observed with the eye cup completely blocked by the external light.

  According to the second aspect of the present invention, by rotating the eye cup, the eye cup can be expanded and contracted, and the observer can use the eye piece with an optimum length.

  A preferred embodiment of the present invention will be described with reference to FIGS.

  The surgical microscope 1 has two eyepieces 2, and an internal thread 3 a is formed at one end of each eyepiece 2. The male screw portion 3b of the eye cup 4 is screwed into the female screw portion 3a.

  The eye cup 4 has a cylindrical shape having a flange 5 at one end, and a rubber 6 is provided on the flange portion 5. The rubber 6 improves the feel when the operator M's eyes are applied, and also has a function of shielding the periphery of the operator M's eyes. The male screw portion 3 b is formed on the opposite side of the eye cup 4 from the flange 5, and is screwed with the female screw portion 3 a of the eyepiece 2.

  Therefore, by rotating the eye cup 4, the eye cup 4 can be expanded and contracted with respect to the eyepiece 2, and the length of the eyepiece 2 can be substantially adjusted.

  A first eyepiece lens 7 and a second eyepiece lens 8 are provided inside the eye cup 4 at a portion corresponding to the male screw portion 3b. Since the first eyepiece lens 7 and the second eyepiece lens 8 are provided with spacers 9, the distance between them is accurately maintained. The first eyepiece lens 7 and the second eyepiece lens 8 are fixed by screwing a stopper 10 after being inserted into the eye cup 4.

  A detachable holder 11 is screwed onto the flange 5 side of the eye cup 4, and an astigmatism correcting lens 12 is held by the holder 11. Another holder 13 is also prepared for the eye cup 4, and a simple cover glass 14 is held in the holder 13 (see FIG. 3).

  When the surgeon M has astigmatism, the holder 11 having the astigmatism correcting lens 12 is attached to the eye cup 4, and when the operator M is not astigmatic, the holder 13 having the cover glass 14 is attached to the eye cup 4 and used.

  When the surgeon M has astigmatism, conventionally, the surgeon M cannot remove the glasses in order to correct astigmatism. For myopia and hyperopia only, I could remove my glasses. This is because the surgical microscope 1 has a focus function, and the diopter such as myopia and hyperopia can be corrected using the focus function. However, astigmatism cannot be dealt with by the focus function, so there was no other way but to correct it with glasses.

  However, according to this embodiment, since the eyecup 4 includes the lens 12 for correcting astigmatism, even when the surgeon M has astigmatism, the operation can be performed with the glasses removed. The astigmatism correcting lens 12 is dedicated to the operator M and has an optimum optical performance corresponding to the degree of astigmatism of the operator M. Since surgery can be performed with astigmatism corrected by the astigmatism correcting lens 12, the operative field can be observed more clearly, and fatigue is reduced. Since the glasses can be removed, external light such as room lighting does not enter the inner surface of the glasses, and the external light can be reliably blocked by the rubber 6 of the eye cup 4.

  The eye cup 4 may be provided with various optical filters and diopter lenses in addition to the astigmatism correcting lens 12. In addition to the surgical microscope 1, the present invention can also be applied to other optical devices such as an astronomical telescope and binoculars. Furthermore, the eyepiece may be monocular instead of binocular.

The perspective view which shows the eyecup for eyepieces which concerns on one Embodiment of this invention. Sectional drawing which shows an eyecup. Sectional drawing which shows the holder for cover glasses.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surgical microscope 2 Eyepiece part 4 Eye cup 6 Rubber 12 Astigmatism correction lens M Operator

Claims (3)

An eyepiece eye cup attached to one end of an eyepiece part of an optical device,
An eye cup for an eyepiece characterized by having a lens for correcting astigmatism inside.   2. The eye cup for an eyepiece according to claim 1, wherein the eye cup is screwed into one end of the eyepiece and is made to expand and contract with respect to the eyepiece by being rotated.   The eyepiece for an eyepiece unit according to claim 2, wherein the astigmatism correcting lens is held in a cylindrical holder, and the holder is detachably screwed into the eyepiece eyecup.

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