阅读说明：本技术 一种医用外科手术放大镜 (Medical surgical magnifier ) 是由 徐安成 王家安 许清泉 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种医用外科手术放大镜,包括透镜组,所述包括第一透镜、第二透镜和第三透镜,所述第一透镜、第二透镜和第三透镜依次位于同一中心线上,所述第一透镜用于校正使用者视力,所述第二透镜和第三透镜构成倒置的伽利略望远镜。本发明结合使用者个性化视力校正,可以有效降低外科手术放大镜的成本且成像质量高。(The invention discloses a medical surgical magnifier, which comprises a lens group, wherein the lens group comprises a first lens, a second lens and a third lens, the first lens, the second lens and the third lens are sequentially positioned on the same central line, the first lens is used for correcting the eyesight of a user, and the second lens and the third lens form an inverted Galileo telescope. The invention combines the personalized vision correction of the user, can effectively reduce the cost of the surgical magnifier and has high imaging quality.)

1. A medical surgical magnifier comprises a lens group and is characterized by comprising a first lens, a second lens and a third lens, wherein the first lens, the second lens and the third lens are sequentially positioned on the same central line, the first lens is used for correcting the eyesight of a user, and the second lens and the third lens form an inverted Galileo telescope.

2. The medical surgical loupe of claim 1, wherein said first lens is a positive lens, a negative lens or an astigmatic lens.

3. The medical surgical loupe of claim 1 or 2, wherein said second lens is a negative lens and said third lens is a positive lens.

4. The medical surgical loupe of claim 3, wherein said second lens is a plano-concave negative lens and said third lens is a plano-convex positive lens.

5. The medical surgical loupe of claim 4, wherein said second lens has a focal length of-15 mm < f2< -14mm, and said third lens has a focal length of 71mm < f2<72 mm.

6. The magnifier assembly of claim 1, wherein the lens groups are symmetrically arranged on the frame.

Technical Field

The invention relates to medical operation optical equipment, in particular to a medical surgical operation magnifier.

Background

Most of the traditional medical operation magnifier adopts an inverted telescope method, and an optical stereo convergence observation technology is used for converging binocular vision lines of an observer in a narrow cavity in a stereo mode to generate a bright and enlarged three-dimensional visual field, so that a unique stereo deep scene is provided for inspection and treatment. But the practical requirements of individual doctors cannot be considered, the visual requirements of each doctor cannot be met, the requirements of the surgical magnifier on clear imaging, no distortion, uniform relative illumination, large working distance and other remarkable characteristics cannot be met, and the cost is higher.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the medical surgical magnifier which is combined with the personalized vision correction of the user, can effectively reduce the cost of the surgical magnifier and has high imaging quality.

The purpose of the invention is realized by the following technical scheme.

The utility model provides a medical surgery magnifying glass, includes the lens group, including first lens, second lens and third lens, first lens, second lens and third lens are located same central line in proper order, first lens is used for rectifying user's eyesight, second lens and third lens constitute the Galileo telescope of inversion.

The first lens is a positive lens, a negative lens or an astigmatic lens.

The second lens is a negative lens, and the third lens is a positive lens.

The second lens is a plano-concave negative lens, and the third lens is a plano-convex positive lens.

The focal length of the second lens is-15 mm < f2< -14mm, and the focal length of the third lens is 71mm < f2<72 mm.

The lens sets are two and are symmetrically arranged on the mirror bracket.

Compared with the prior art, the invention has the advantages that: the invention combines the personalized vision correction of the user, can effectively reduce the cost of the surgical magnifier and has high imaging quality, and the second lens L2 is a negative lens and is an expanded view field; the third lens L3 is a positive lens, compressing the field of view; the second lens L2 and the third lens L3 are negative-positive lenses, which eliminate spherical aberration and distortion organically and approach to zero; the second lens L2 mainly adopts a plano-concave lens design, so that the positive spherical aberration brought by a negative lens is reduced as much as possible; the third lens L3 is mainly plano-convex, mainly compressing the light and correcting the positive spherical aberration of the front negative lens component at the same time.

Drawings

FIG. 1 is an optical block diagram of a medical customized surgical magnifier lens;

FIG. 2 is a diagram of image plane relative illumination of a lens of a medical customized surgical magnifier;

fig. 3 is a distortion diagram of a medical personalized surgical magnifier lens.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples.

The lens designed by the invention is suitable for working in a visible light environment, the wavelength range is 0.486-0.656 microns, and the dominant wavelength is 0.588 microns.

As shown in fig. 1, a medical surgical magnifier comprises a lens group, which comprises a first lens L1, a second lens L2 and a third lens L3, wherein the first lens L1, the second lens L2 and the third lens L3 are sequentially positioned on the same central line, the first lens L1 is used for correcting the eyesight of a user, and the second lens L2 and the third lens L3 form an inverted galilean telescope.

The first lens L1 is a positive lens, a negative lens or an astigmatic lens. The operating magnifier needs to test the vision condition of a user before manufacturing, and needs to be corrected during design.

The second lens L2 is a negative lens, and the third lens L3 is a positive lens.

The second lens L2 is a plano-concave negative lens, and the third lens L3 is a plano-convex positive lens. Both L2 and L3 have flat surfaces for ease of installation.

The focal length of the second lens L2 is-15 mm < f2< -14mm, and the focal length of the third lens L3 is 71mm < f2<72 mm.

The two lens groups are symmetrically arranged on the lens bracket to form a binocular surgical magnifier.

The second lens L2 and the third lens L3 are identical in material; the diaphragm of the invention is arranged on the frame of the first lens L1, thereby effectively ensuring a proper field of view.

The lens parameters of the invention include the thickness and the distance of each lens, the refractive index of each lens, the curvature radius, the focal length F and the refractive index of each lens material. The following table is specific.