CN212326351U - Low-distortion optical system of wide-angle sinus speculum - Google Patents
Low-distortion optical system of wide-angle sinus speculum Download PDFInfo
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- CN212326351U CN212326351U CN202021593618.0U CN202021593618U CN212326351U CN 212326351 U CN212326351 U CN 212326351U CN 202021593618 U CN202021593618 U CN 202021593618U CN 212326351 U CN212326351 U CN 212326351U
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Abstract
The utility model relates to a low distortion optical system of wide-angle nasal sinus mirror, which comprises an objective lens group, a rod lens group I, a rod lens group II, a rod lens group III and an eyepiece lens group which are arranged in a lens tube in sequence, wherein the objective lens group consists of six lens pieces which are sequentially arranged into a planoconcave lens, a biconvex lens and a biconstituent lens from outside to inside; the first rod lens group, the second rod lens group and the third rod lens group are all image rotating rod lens groups; the eyepiece group is composed of a cementing group; the utility model discloses an optical system can realize the visual effect of low distortion, and the doctor is when observing, and obvious convex surface shrink feels and reduces, and is more convenient during the use, observes the accuracy.
Description
Technical Field
The utility model relates to an endoscope optical system device field specifically is a low distortion optical system of wide angle sinus mirror.
Background
The endoscope is an important tool for medical intervention treatment and observation, in the current endoscope market, the field range of wide-angle sinus endoscope reaches 80 degrees, the imaging distortion is increased sharply along with the increase of the field, and the distortion shows nonlinear increase after the field is more than 60 degrees.
At present, in the medical market, the distortion of a paranasal sinus mirror with a 80-degree visual field is generally about 20%, and a doctor has obvious convex contraction feeling during observation, as shown in fig. 1.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a low distortion optical system of wide angle sinus mirror is provided to solve the defect that exists among the prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a low distortion optical system of a wide-angle nasal sinus mirror comprises an objective lens group, a rod lens group I, a rod lens group II, a rod lens group III and an eyepiece lens group which are sequentially arranged in a mirror tube, wherein the objective lens group consists of six lens pieces and is sequentially arranged into a plano-concave mirror, a flat mirror, a plano-convex mirror, a biconvex mirror and a double-glue combination group from outside to inside; the first rod lens group, the second rod lens group and the third rod lens group are all image rotating rod lens groups; the eyepiece group is composed of a cementing group;
furthermore, the image rotating rod mirror group comprises two rod mirrors positioned at two ends and a rod mirror bonding group between the two rod mirrors;
further, the flat mirrors of the objective lens group may be constant, and may be replaced by turning prisms of 30, 45, 70, and the turning prisms of 30, 45, 70 are aplanatic.
The utility model has the advantages that: the utility model discloses an optical system can realize the visual effect of low distortion, and the doctor is when observing, and obvious convex surface shrink feels and reduces, and is more convenient during the use, observes the accuracy.
Drawings
FIG. 1 is a schematic diagram of a prior art sinoscope distortion;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a schematic view of the objective lens assembly of the present invention;
FIG. 4 is a schematic view of the rod lens assembly of the present invention;
FIG. 5 is a schematic view of the split structure of the eyepiece set of the present invention;
FIG. 6 is a schematic view of the distortion of the sinoscope of the present invention;
fig. 7, fig. 8 and fig. 9 are schematic diagrams illustrating the analysis of the results of the present invention;
the reference numerals are explained below:
1. an objective lens group, 11, a plano-concave mirror, 12, a plano-mirror, 13, a plano-convex mirror, 14, a biconvex mirror, 15 and a biconstituent group; 2. the rod lens group I, 3, the rod lens group II, 4, the rod lens group III, 5, the eyepiece group 6, the rod lens, 7 and the rod lens glue group;
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 2-5, a low distortion optical system of a wide-angle sinus mirror comprises an objective lens group 1, a rod lens group one 2, a rod lens group two 3, a rod lens group three 4 and an eyepiece lens group 5 which are sequentially arranged in a mirror tube, wherein the objective lens group consists of six lens pieces which are sequentially arranged as a planoconcave mirror 11, a flat mirror 12, a planoconcave mirror 13, a biconvex mirror 14 and a biconvex lens group 15 from outside to inside; the first rod lens group 2, the second rod lens group 3 and the third rod lens group 4 are all image rotating rod lens groups; the eyepiece group 5 is composed of a cementing group;
in a specific embodiment, the relay rod mirror group comprises two rod mirrors 6 at two ends and a rod mirror bonding group 7 between the two rod mirrors 6;
more specifically, the flat mirror 12 of the objective lens group 1 may be a constant, and may be replaced by a turning prism of 30, 45, 70; and the turning prisms of 30, 45, 70 are aplanatic.
This system realizes the formation of image through objective group, three group's rod mirror group and eyepiece group, can obviously see out through the distortion map of contrast figure 1 and figure 6, the utility model discloses an optical system can realize the visual effect of low distortion, and the doctor is when observing, and obvious convex surface shrink feels and reduces, and is more convenient during the use, observes the accuracy.
It is also apparent from the quantitative analysis of fig. 7-9 that the distortion of the present invention is significantly improved compared to the prior art, and through calculation, the distortion of the newly designed system is reduced to 13%, and the distortion is improved a lot, which is more convenient for use.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (3)
1. A low distortion optical system for a wide angle sinoscope, comprising: the optical lens comprises an objective lens group, a rod lens group I, a rod lens group II, a rod lens group III and an eyepiece lens group which are sequentially arranged in a lens tube, wherein the objective lens group consists of six lens pieces and is sequentially arranged into a plano-concave lens, a flat lens, a plano-convex lens, a biconvex lens and a biconstituent group from outside to inside; the first rod lens group, the second rod lens group and the third rod lens group are all image rotating rod lens groups; the eyepiece group is composed of a cementing group.
2. The low distortion optical system of a wide angle sinus mirror of claim 1 wherein: the image rotating rod mirror group comprises two rod mirrors positioned at two ends and a rod mirror adhesive group between the two rod mirrors.
3. The low distortion optical system of a wide angle sinus mirror of claim 2 wherein: the flat mirrors of the objective group may be constant, may be replaced by turning prisms of 30, 45, 70, and the turning prisms of 30, 45, 70 are aplanatic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021593618.0U CN212326351U (en) | 2020-08-04 | 2020-08-04 | Low-distortion optical system of wide-angle sinus speculum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021593618.0U CN212326351U (en) | 2020-08-04 | 2020-08-04 | Low-distortion optical system of wide-angle sinus speculum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212326351U true CN212326351U (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021593618.0U Active CN212326351U (en) | 2020-08-04 | 2020-08-04 | Low-distortion optical system of wide-angle sinus speculum |
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| CN (1) | CN212326351U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113616142A (en) * | 2021-08-09 | 2021-11-09 | 浙江天松医疗器械股份有限公司 | 4K paranasal sinuscope |
-
2020
- 2020-08-04 CN CN202021593618.0U patent/CN212326351U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113616142A (en) * | 2021-08-09 | 2021-11-09 | 浙江天松医疗器械股份有限公司 | 4K paranasal sinuscope |
| CN113616142B (en) * | 2021-08-09 | 2023-08-29 | 浙江天松医疗器械股份有限公司 | 4K nasosinusitis |
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