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6x ultra-long working distance objective lens

A technology with a working distance and ultra-long, applied in the field of optical components, can solve the problems of small exit pupil diameter, small observation field of view, and difficult to achieve 100% clear imaging range, and achieve large exit pupil diameter, high resolution, and processing good workmanship effect

Active Publication Date: 2015-08-12
WUZHOU OKA OPTICAL INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a 6 times ultra-long working distance objective lens, which can solve the problems that the existing objective lens has a small observation field of view, a small exit pupil diameter, and it is difficult to achieve 100% imaging clarity.

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  • 6x ultra-long working distance objective lens

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with accompanying drawing embodiment:

[0021] figure 1 The 6x ultra-long working distance objective lens is one of the lenses of the large-field microscope. It has the characteristics of long working distance and large field of view at the image side. The field curvature is controlled at a fixed value (around R-420), which is consistent with The spherical radius R values ​​of the spherical mirrors are basically equal. Viewed from the object space to the image space, the entire system structure is composed of two components, G1 and G2. The first component G1 has positive optical power, and the second component G2 has negative optical power. The first component G1 is composed of 3 lens groups, and the second component G2 is composed of one lens group. The first component G1 has a first lens group L1, a second lens group L2 and a third lens group L3; the three lens groups L1, L2, L3 are basic...

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Abstract

The invention discloses a six-time over-long working distance objective lens. A whole system is composed of two components, the first component has the positive focal power, the second component has the negative focal power, the first component is composed of three lens sets, the second component is composed of a fourth lens set, the focal length of the first component is fG1, the focal length of the second component is fG2, and the fG1 and the fG2 meet the following condition: 0.98<|fG2 / fG1|<1.35. In the lens sets of the first component, the focal length of the first lens set is fL1, the focal length of the second lens set is fL2, the focal length of the third lens set is fL3, and the fL1, the fL2 and the fL3 meet the conditions: 119< fL2<135, and 0.5< fL1 / fL3<0.7. The focal length of the second component is fG2, and the fG2 meets the condition: -78< fG2<-70. The six-time over-long working distance objective lens solves the problem that the observation view field of the objective lens is small, the exit pupil diameter is small, and the imaging clearness scope cannot achieve 100%.

Description

technical field [0001] The invention relates to the technical field of optical elements, in particular to a visual optical device for observing images formed by a front optical system. Background technique [0002] Large field of view microscope is a new type of microscope with a wide field of view. At the same time, it can take into account clear images, large exit pupil diameter, comfortable observation, convenient operation, and strong three-dimensional effect. It is widely used in biological anatomy, electronic industry, mineral research, etc. field. In a large-field microscope, the magnification of the microscope mainly depends on the objective lens. The quality of the objective lens directly affects the imaging quality of the microscope. It is the main component that determines the resolution and imaging clarity of the microscope. The objective lens is an important part of the optical visual instrument. Its function is to magnify the object into a primary image, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B21/02
Inventor 陈群
Owner WUZHOU OKA OPTICAL INSTR
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