CN114167598A - Prism type magnifying lens and medical operation magnifier - Google Patents
Prism type magnifying lens and medical operation magnifier Download PDFInfo
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- CN114167598A CN114167598A CN202111511547.4A CN202111511547A CN114167598A CN 114167598 A CN114167598 A CN 114167598A CN 202111511547 A CN202111511547 A CN 202111511547A CN 114167598 A CN114167598 A CN 114167598A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/36—Image-producing devices or illumination devices not otherwise provided for
- A61B90/361—Image-producing devices, e.g. surgical cameras
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/04—Catoptric systems, e.g. image erecting and reversing system using prisms only
- G02B17/045—Catoptric systems, e.g. image erecting and reversing system using prisms only having static image erecting or reversing properties only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/1805—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for prisms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/36—Image-producing devices or illumination devices not otherwise provided for
- A61B90/361—Image-producing devices, e.g. surgical cameras
- A61B2090/3616—Magnifying glass
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Abstract
The invention relates to a prism type magnifying lens and a medical operation magnifier. Comprises an objective lens group, a steering prism group and an eyepiece lens group which are sequentially arranged from front to back along the direction of an optical axis; the steering prism group comprises two right-angle prisms and a roof prism, and the two right-angle prisms are symmetrically arranged in front and back and are used for enabling the objective lens group to be imaged and turned over up and down; the roof prism is arranged between the two right-angle prisms and is used for enabling the objective lens group to form images and turn left and right. The invention adopts the prism combination of two right-angle prisms and one roof prism to replace the prism combination of half pentagon and roof in the magnifier with Kepler structure, so that the objective lens is inverted to be symmetrical and overturned up and down and left and right, and the positive image can be seen from the eyepiece, and the diameter of the optical system of the lens in the prism combination is reduced to the same diameter as that of the eyepiece lens, thereby reducing the outer diameter of the lens and the whole weight of the lens.
Description
Technical Field
The invention relates to the field of optical lenses, in particular to a prism type magnifying lens and a medical operation magnifier.
Background
When clinical operation is performed, it is very critical to accurately identify the operation site. The naked eye has certain limitation in the operation of tiny parts, so optical instruments such as a magnifying glass and a microscope are required to be used frequently. However, the conventional microscope and magnifier are cumbersome to move and convert during use. The operation magnifier is a medical auxiliary instrument widely used in clinic, which stereoscopically converges the binocular vision of an observer in a narrow cavity to generate a brightly amplified three-dimensional visual field and provide a unique stereoscopic deep scene for examination and treatment. Two common operation magnifying lens styles in China at present are a head-mounted type and a turnover type. Among them, the flip-type operation magnifier is a popular one at present. When in use, the binocular lens is fixed in front of eyes of a user and can be turned aside when not in use, and the visual field of the user is not influenced.
The medical lenses currently used in the market have the following disadvantages:
firstly, the working distance is not adjustable, the magnifier needs to be replaced at different working distances, and misoperation and operation time waste are easily increased in the operation process;
the Galileo lens inevitably has tubular visual field and visual field vignetting due to the defects of the optical system, and when the magnification is larger (more than 4), the influence caused by the defects is more obvious;
third, the general kepler type lens that uses half pentagon plus roof combined prism, like the kepler type operation magnifier disclosed in utility model patent with application number 201020276972.0, because half pentagon plus roof gives that to close the prism size big for the external diameter increase of lens is 1.3-1.5 times, and weight also increases.
Disclosure of Invention
The invention aims to: overcome above shortcoming and provide a prism formula magnifying lens and medical treatment operation magnifying glass, this camera lens adopts the prism combination of half pentagon in the magnifying glass of two right angle prisms plus a roof prism to replace the kepler structure and adds the prism combination of roof, make the objective become the inverted image from top to bottom, bilateral symmetry upset, thereby can see positive image from the eyepiece, and the optical system of camera lens will reduce to the diameter the same with the eyepiece lens at the diameter of prism group, thereby reduced the external diameter size of camera lens, lighten the whole weight of camera lens.
The invention is realized by the following technical scheme:
the first scheme is as follows:
a kind of prism type magnifying lens, characterized by that: comprises an objective lens group, a steering prism group and an eyepiece lens group which are sequentially arranged from front to back along the direction of an optical axis;
the steering prism group comprises two right-angle prisms and a roof prism, and the two right-angle prisms are symmetrically arranged in front and back and are used for enabling the objective lens group to be imaged and turned over up and down; the roof prism is arranged between the two right-angle prisms and is used for enabling the objective lens group to form images and turn left and right.
For reaching better optical imaging effect, two right-angle prism all have a right angle face perpendicular to optical axis, and another right angle face is the bottom surface that is on a parallel with the optical axis, and the inclined plane all is located and is close to roof prism one side, and the incident surface and the emergent surface of roof prism are parallel with the inclined plane of two right-angle prism respectively or coincide.
Preferably, the respective inclined surfaces of the two right-angle prisms coincide with the sides of the respective bottom surfaces which intersect; the lower part of the roof prism is in a triangular prism shape, the front surface and the rear surface of the lower part of the roof prism are respectively an incident surface and an emergent surface and are intersected at included angles and are respectively superposed with inclined surfaces of the two right-angle prisms, and the left plane and the right plane of the lower part of the roof prism are parallel to each other;
the left surface and the right surface of the upper portion of the ridge prism are respectively a first ridge surface and a second ridge surface, included angles of the upper portions of the first ridge surface and the second ridge surface are intersected, the lower portion of the first ridge surface and the upper portion of the left plane share one edge, the lower portion of the second ridge surface and the upper portion of the right plane share one edge, the front side face of the upper portion of the ridge prism is triangular, the lower portion of the front side face and the upper portion of the incident face share one edge, the upper vertex of the front side face is located on the intersected edges of the two ridge surfaces, the rear side face of the upper portion of the ridge prism is triangular, the lower portion of the rear side face and the upper portion of the reflecting face share one edge, and the upper vertex of the rear side face is located on the intersected edges of the two ridge surfaces.
Preferably, an included angle ≈ α between the first ridge surface and the second ridge surface of the ridge prism is: 88-92 degrees, and the included angle beta between the incident surface and the emergent surface of the roof prism is as follows: 116-124 degrees; the included angle [ gamma ] between the inclined plane of the right-angle prism and the bottom surface is as follows: 28 to 32 degrees.
Preferably, the objective lens group is formed by a first lens and a second lens which are cemented together and have positive focal power, the first lens is a double convex lens having positive focal power, and the second lens is a meniscus lens having negative focal power;
the eyepiece group comprises a third lens, a fourth lens and a fifth lens, wherein the third lens is a meniscus lens with positive focal power, the front of the meniscus lens is concave, the back of the meniscus lens is convex, the fourth lens is a double-convex lens with positive focal power, the fifth lens is a meniscus lens with negative focal power, and the fourth lens and the fifth lens form a double-cemented group with positive focal power.
Preferably, the refractive index Nd1 of the first lens is 1.7-1.8, and the Abbe constant Vd1 is 45-53;
the refractive index Nd2 of the second lens is 1.8-1.9, and the Abbe constant Vd2 is 30-35;
the refractive index Nd3 of the third lens is 1.8-1.9, and the Abbe constant Vd3 is 30-35;
the refractive index Nd4 of the fourth lens is 1.8-1.9, and the Abbe constant Vd4 is 40-50;
the refractive index Nd5 of the fifth lens is 1.9-2, and the Abbe constant Vd5 is 18-28.
In order to facilitate the adjustment of the working distance, the prism type magnifying lens further comprises an eyepiece barrel for fixedly mounting the steering prism group and the eyepiece group and an objective lens barrel for fixedly mounting the objective lens group, wherein the objective lens barrel is in threaded connection with the front end of the eyepiece barrel.
In order to ensure the structure stability and the sealing performance, a prism bracket for installing a prism group is connected with the middle part of the front end of the eyepiece barrel in a threaded manner, a concave cavity for clamping the eyepiece group is arranged in the middle of the rear end of the eyepiece barrel, the eyepiece group is clamped in the concave cavity, and a pressing ring which is used for pressing the eyepiece group and is in threaded connection with the inner peripheral wall of the concave cavity is also arranged behind the eyepiece group; an O-shaped sealing ring is further arranged between the outer peripheral wall of the pressing ring and the inner peripheral wall of the concave cavity, and waterproof glue is coated on the contact surface of the inner periphery of the objective lens barrel and the outer periphery of the objective lens group.
In order to adapt to users with eyes with different vision, a protective window sheet or a diopter lens is also arranged in the middle of the pressing ring.
Scheme II:
a medical surgical loupe, characterized in that: the three-prism type magnifying lens comprises a spectacle frame and two triangular prism type magnifying lenses which are arranged on the spectacle frame and are provided by the scheme I.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a prism type magnifying lens and a medical operation magnifier, wherein the lens adopts a prism combination of two right-angle prisms and a roof prism to replace a prism combination of a half pentagon and a roof in a magnifier with a Kepler structure, so that the diameter of an optical system of the lens in the prism combination is reduced to be the same as that of an eyepiece lens, thereby reducing the outer diameter of the lens and the whole weight of the lens.
2. The invention has the advantages of small outer diameter size, light weight and enlarged object image.
3. The eyepiece barrel and the objective lens barrel are connected through the threads, can be linearly adjusted, and has the advantage of adjustable working distance.
4. According to the invention, the steering prism group is screwed into the eyepiece barrel through the prism support, the eyepiece group is pressed tightly through the pressing ring and sealed through the O-shaped sealing ring, so that the structure is stable, and the high anti-seismic effect is achieved.
5. The prism type magnifying lens of the present invention can be used in various microscopic magnifying or telescope fields according to the working distance and magnification.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is an assembly view of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a steering prism assembly according to an embodiment of the present invention;
FIG. 4 is a front view of a right angle prism according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a roof prism according to an embodiment of the present invention;
FIG. 6 is a schematic representation of a roof prism according to one embodiment of the present invention;
FIG. 7 is a left side view of a roof prism in accordance with an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a second embodiment of the present invention.
Description of reference numerals: the lens comprises a 1-eyepiece barrel, an 11-concave cavity, a 2-objective barrel, a 3-prism bracket, a 4-pressing ring, a 5-O-shaped sealing ring, a 6-protective window sheet, a 7-eye holder, an L-objective lens group, an L1-first lens, an L2-second lens, an H-steering prism group, an H1-right-angle prism, an H2-roof prism, a G-wood lens group, a G1-third lens, a G2-fourth lens, a G3-fifth lens, an a-inclined plane, a-bottom plane, a c 1-incident plane, a c 2-emergent plane, a d 1-left plane, a d 2-right plane, an e 1-first roof plane, an e 2-second roof plane, a f 1-front side face and a f 2-rear side face.
Detailed Description
The invention is described in detail below with reference to the following description of the drawings:
the first embodiment is as follows:
as shown in fig. 1 to 8, a prism type magnifying lens mainly includes an objective lens group L, a steering prism group H, and an eyepiece lens group G, which are sequentially arranged from front to back along an optical axis direction;
the steering prism group H comprises two right-angle prisms H1 and a roof prism H2, and the two right-angle prisms H1 are symmetrically arranged in front and back to enable the objective lens group L to form an image and turn over up and down; the roof prism H2 is disposed between the two right-angle prisms H1 for imaging the objective lens group L upside down.
Preferably, each of the two right-angle prisms H1 has a right-angle surface perpendicular to the optical axis, the other right-angle surface is a bottom surface b parallel to the optical axis, the inclined surfaces are located on a side close to the roof prism H2, and the incident surface c1 and the exit surface c2 of the roof prism H2 are respectively parallel to or coincide with the inclined surfaces a of the two right-angle prisms H1.
Preferably, the sides of the two right-angle prisms H1 where the respective inclined surfaces a meet the respective bottom surfaces b coincide; the lower part of the roof prism H2 is in a triangular prism shape, the front surface and the rear surface of the lower part of the roof prism H2 are an incident surface c1 and an emergent surface c2 respectively, are intersected in an included angle and are overlapped with the inclined surfaces a of the two right-angle prisms H1 respectively, and the left plane d1 and the right plane d2 of the lower part of the roof prism H2 are parallel to each other;
the left surface and the right surface of the upper part of the ridge prism H2 are respectively a first ridge surface e1 and a second ridge surface e2, the included angles of the upper parts of a first ridge surface e1 and a second ridge surface e2 are intersected, the lower part of the first ridge surface e1 and the upper part of a left plane d1 share one edge, the lower part of the second ridge surface e2 and the upper part of a right plane d2 share one edge, the front side surface f1 of the upper part of the ridge prism H2 is triangular, the lower part of the upper part of the ridge prism H2 and the upper part of an incidence surface c1 share one edge, the vertex of the upper part of the front side surface f1 is located on the intersected edge of the two ridge surfaces, the rear side surface f2 of the upper part of the ridge prism H2 is triangular, the lower part of the rear side surface f2 and the upper part of the reflection surface c2 share one edge, and the vertex of the upper part of the rear side surface f2 is located on the intersected edge of the two ridge surfaces.
Preferably, the included angle ^ a between the first ridge surface e1 and the second ridge surface e2 of the roof prism H2 is as follows: 88-92 degrees, and the included angle ^ beta between the incident surface c1 and the emergent surface c2 of the roof prism H2 is as follows: 116-124 degrees; the included angle between the inclined plane a of the right-angle prism H1 and the bottom surface b is: 28 to 32 degrees.
Preferably, the objective lens group L is formed by a first lens L1 and a second lens L2 which are cemented together and have positive optical power, the first lens L1 is a double convex lens having positive optical power, and the second lens L2 is a meniscus lens having negative optical power;
the eyepiece group G comprises a third lens G1, a fourth lens G2 and a fifth lens G3, the third lens G1 is a meniscus lens with positive focal power, concave front and convex back, the fourth lens G2 is a double convex lens with positive focal power, the fifth lens G3 is a meniscus lens with negative focal power, and the fourth lens G2 and the fifth lens G3 form a double cemented group with positive focal power.
Preferably, the refractive index Nd1 of the first lens L1 is 1.7-1.8, and the Abbe constant Vd1 is 45-53;
the refractive index Nd2 of the second lens L2 is 1.8-1.9, and the Abbe constant Vd2 is 30-35;
the refractive index Nd3 of the third lens G1 is 1.8-1.9, and the Abbe constant Vd3 is 30-35;
the refractive index Nd4 of the fourth lens G2 is 1.8-1.9, and the Abbe constant Vd4 is 40-50; the refractive index Nd5 of the fifth lens G3 is 1.9-2, and the Abbe constant Vd5 is 18-28.
The optical parameters of each lens are as follows:
wherein, the surfaces of each lens in the objective lens group L, the steering prism group H and the ocular lens group G are covered with a plurality of layers of antireflection coatings for ensuring that the effective light transmittance of each lens element is more than 99.5 percent in the spectral range of 420-680. After each lens is coated with the antireflection film, the imaging effect is clearer, and the influence of ghost on the imaging effect can be reduced.
In order to adjust the working distance conveniently, the prism type magnifying lens further comprises an eyepiece barrel 1 for fixedly mounting the steering prism group H and the eyepiece group G and an objective lens barrel 2 for fixedly mounting the objective lens group L, wherein the objective lens barrel 2 is in threaded connection with the front end of the eyepiece barrel 1.
In order to ensure the structure stability and the sealing performance, the middle part of the front end of the eyepiece barrel 1 is in threaded connection with a prism bracket 3 for mounting a prism group H, the middle part of the rear end of the eyepiece barrel 1 is provided with a concave cavity 11 for clamping an eyepiece group G, the eyepiece group G is clamped in the concave cavity 11, and the rear part of the eyepiece group G is also provided with a pressing ring 4 which is used for pressing the eyepiece group G and is in threaded connection with the inner peripheral wall of the concave cavity 11; an O-shaped sealing ring 5 is further arranged between the outer peripheral wall of the pressing ring 4 and the inner peripheral wall of the concave cavity 11, and waterproof glue is coated on the contact surface of the inner periphery of the objective lens barrel 2 and the outer periphery of the objective lens group L.
In order to adapt to users with eyes with different vision, a protective window sheet 6 or a diopter lens is also arranged in the middle of the pressing ring 4.
The three-prism type magnifying lens of the embodiment has a magnification of 3.5 times (4.5 times, 5.5 times and other magnifications suitable for medical operations can be designed in the same series), has low distortion, can ensure that all aberrations and chromatic aberration are compensated, and can design all parameters of the lens through a plane according to a plane at an object distance required in actual use as a reference object plane, so that a maximum depth of field value which is closest to an ideal condition can be obtained, and the close shot and the long shot of the lens in a use range can be clearly imaged.
The prism combination is used to make the inverted image formed by the objective lens turn up and down and left and right symmetrically, and the positive image can be seen from the ocular lens from the surface. The application range of the patent operation magnifying lens of the invention includes but is not limited to the lens on a medical operation magnifier, and the invention can be applied to various microscopic magnifications or telescope fields according to the working distance and magnification.
Example two:
as shown in fig. 1-8, a medical operation magnifier is characterized in that: comprises a spectacle frame 7 and two triangular prism type magnifying lenses which are arranged on the spectacle frame 7 and are described in the first embodiment.
While the invention has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. It is understood, therefore, that the invention is not to be in any way limited except by the appended claims and their equivalents.
Claims (10)
1. A kind of prism type magnifying lens, characterized by that: comprises an objective lens group (L), a steering prism group (H) and an eyepiece lens group (G) which are arranged in sequence from front to back along the direction of an optical axis;
the steering prism group (H) comprises two right-angle prisms (H1) and a roof prism (H2), and the two right-angle prisms (H1) are symmetrically arranged in front and back to enable the image of the objective lens group (L) to be turned over up and down; the roof prism (H2) is arranged between the two right-angle prisms (H1) and is used for enabling the objective lens group (L) to form images and turn left and right.
2. The triangular prism-type magnifying lens according to claim 1, wherein: two right angle prisms (H1) all have a right angle face perpendicular to the optical axis, and another right angle face is the bottom surface (b) that is on a parallel with the optical axis, and the inclined plane all is located and is close to roof prism (H2) one side, and roof prism's (H2) incident surface (c1) and emergent surface (c2) are parallel with inclined plane (a) of two right angle prisms (H1) respectively or coincide.
3. The triangular prism-type magnifying lens according to claim 2, wherein: the sides of the two right-angle prisms (H1) where the inclined surfaces (a) intersect with the bottom surfaces (b) coincide;
the lower part of the roof prism (H2) is in a triangular prism shape, the front surface and the rear surface of the lower part of the roof prism (H2) are respectively an incident surface (c1) and an emergent surface (c2) and are intersected in an included angle and are respectively superposed with the inclined surfaces (a) of the two right-angle prisms (H1), and the left plane (d1) and the right plane (d2) of the lower part of the roof prism (H2) are parallel to each other;
the left surface and the right surface of the upper part of the ridge prism (H2) are respectively a first ridge surface (e1) and a second ridge surface (e2), the included angles of the upper parts of the first ridge surface (e1) and the second ridge surface (e2) are intersected, the lower part of the first ridge surface (e1) and the upper part of the left plane (d1) share one side, the lower part of the second ridge surface (e2) and the upper part of the right plane (d2) share one side, the front side surface (f1) of the upper part of the ridge prism (H2) is triangular, the lower part of the front side surface (f1) and the upper part of the incident surface (c1) share one side, the upper vertex of the front side surface (f1) is located on the intersected side of the two ridge surfaces, the rear side surface (f2) of the upper part of the ridge prism (H2) is triangular, the lower part of the rear side surface (f2) and the upper vertex of the reflecting surface (c2) and the two ridge surfaces are intersected.
4. The triangular prism-type magnifying lens according to claim 3, wherein: the included angle alpha of the first roof ridge surface (e1) and the second roof ridge surface (e2) of the roof prism (H2) is as follows: 88-92 degrees, and the included angle beta between the incident surface (c1) and the emergent surface (c2) of the roof prism (H2) is as follows: 116-124 degrees; the included angle gamma between the inclined plane (a) of the right-angle prism (H1) and the bottom plane (b) is as follows: 28 to 32 degrees.
5. The triangular prism-type magnifying lens according to claim 1, wherein: the objective lens group (L) is formed by a first lens (L1) and a second lens (L2) which are cemented together and have positive optical power, the first lens (L1) is a double convex lens having positive optical power, and the second lens (L2) is a meniscus lens having negative optical power;
the eyepiece group (G) comprises a third lens (G1), a fourth lens (G2) and a fifth lens (G3), wherein the third lens (G1) is a meniscus lens with positive focal power, the front part of the meniscus lens is concave, the rear part of the meniscus lens is convex, the fourth lens (G2) is a double-convex lens with positive focal power, the fifth lens (G3) is a meniscus lens with negative focal power, and the fourth lens (G2) and the fifth lens (G3) form a double-cemented group with positive focal power.
6. The triangular prism-type magnifying lens according to claim 5, wherein: the refractive index Nd1 of the first lens (L1) is 1.7-1.8, and the Abbe constant Vd1 is 45-53;
the refractive index Nd2 of the second lens (L2) is 1.8-1.9, and the Abbe constant Vd2 is 30-35;
the refractive index Nd3 of the third lens (G1) is 1.8-1.9, and the Abbe constant Vd3 is 30-35;
the refractive index Nd4 of the fourth lens (G2) is 1.8-1.9, and the Abbe constant Vd4 is 40-50;
the refractive index Nd5 of the fifth lens (G3) is 1.9-2, and the Abbe constant Vd5 is 18-28.
7. The triangular prism-type magnifying lens according to claim 1, wherein: the prism type magnifying lens further comprises an eyepiece barrel (1) for fixedly mounting the steering prism group (H) and the eyepiece group (G) and an objective lens barrel (2) for fixedly mounting the objective lens group (L), wherein the objective lens barrel (2) is in threaded connection with the front end of the eyepiece barrel (1).
8. The triangular prism-type magnifying lens according to claim 7, wherein: the middle part of the front end of the eyepiece sleeve (1) is in threaded connection with a prism bracket (3) for mounting a prism group (H), the middle part of the rear end of the eyepiece sleeve (1) is provided with a concave cavity (11) for clamping an eyepiece group (G), the eyepiece group (G) is clamped in the concave cavity (11), and the rear part of the eyepiece group (G) is also provided with a pressing ring (4) which is used for pressing the eyepiece group (G) and is in threaded connection with the inner peripheral wall of the concave cavity (11); an O-shaped sealing ring (5) is further arranged between the outer peripheral wall of the pressing ring (4) and the inner peripheral wall of the concave cavity (11), and waterproof glue is coated on the contact surface of the inner periphery of the objective lens barrel (2) and the outer periphery of the objective lens group (L).
9. The triangular prism-type magnifying lens according to claim 8, wherein: and a protective window sheet (6) or a diopter lens is also arranged in the middle of the pressing ring (4).
10. A medical surgical loupe, characterized in that: comprising a spectacle frame (7) and two triple prism magnifying lenses according to any of claims 1 to 9 arranged on the spectacle frame (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111511547.4A CN114167598B (en) | 2021-12-06 | 2021-12-06 | Triple prism type magnifying lens and medical operation magnifying lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111511547.4A CN114167598B (en) | 2021-12-06 | 2021-12-06 | Triple prism type magnifying lens and medical operation magnifying lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114167598A true CN114167598A (en) | 2022-03-11 |
| CN114167598B CN114167598B (en) | 2023-06-16 |
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| CN202111511547.4A Active CN114167598B (en) | 2021-12-06 | 2021-12-06 | Triple prism type magnifying lens and medical operation magnifying lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114895445A (en) * | 2022-05-19 | 2022-08-12 | 湖北久之洋红外系统股份有限公司 | 180-degree reflecting prism group with image translation characteristic |
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| CN106940473A (en) * | 2017-04-19 | 2017-07-11 | 深圳市迈测科技股份有限公司 | A kind of simple eye telescope of laser ranging |
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| EP3561554A1 (en) * | 2016-12-23 | 2019-10-30 | Chongqing Hylon Co., Ltd. | Composite prism for multi-functional telescope, and binocular telescopic optical system for same |
| CN211236323U (en) * | 2019-12-18 | 2020-08-11 | 重庆爱特光电有限公司 | Prism structure |
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| EP0646822A2 (en) * | 1993-10-04 | 1995-04-05 | Hiromi Matsushima | Expandable and tiltable optical system |
| CN206460209U (en) * | 2016-11-24 | 2017-09-01 | 甘晟华 | Range-finding telescope |
| EP3561554A1 (en) * | 2016-12-23 | 2019-10-30 | Chongqing Hylon Co., Ltd. | Composite prism for multi-functional telescope, and binocular telescopic optical system for same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114895445A (en) * | 2022-05-19 | 2022-08-12 | 湖北久之洋红外系统股份有限公司 | 180-degree reflecting prism group with image translation characteristic |
| CN114895445B (en) * | 2022-05-19 | 2024-05-28 | 湖北久之洋红外系统股份有限公司 | 180-Degree reflecting prism group with image translation characteristic |
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| CN114167598B (en) | 2023-06-16 |
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