CN110187488B - Optical microscope - Google Patents
Optical microscope Download PDFInfo
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- CN110187488B CN110187488B CN201910483628.4A CN201910483628A CN110187488B CN 110187488 B CN110187488 B CN 110187488B CN 201910483628 A CN201910483628 A CN 201910483628A CN 110187488 B CN110187488 B CN 110187488B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 82
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 238000005286 illumination Methods 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/02—Objectives
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/36—Microscopes arranged for photographic purposes or projection purposes or digital imaging or video purposes including associated control and data processing arrangements
- G02B21/361—Optical details, e.g. image relay to the camera or image sensor
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/36—Microscopes arranged for photographic purposes or projection purposes or digital imaging or video purposes including associated control and data processing arrangements
- G02B21/364—Projection microscopes
Abstract
An optical microscope belongs to the technical field of optics and comprises a microscope base, a microscope arm, an objective table, an objective optical device, a head cover, a projection screen, a focusing hand wheel, a reflector A, a reflector B and a toothed bar; the objective optical device comprises a rear fixed group objective seat, a rear fixed group objective lens, a front group objective lens A, a front group objective lens B, a front group objective lens C, a front group objective lens D, a large base objective main seat, an objective conversion disc, a rotating cover and screws; the beneficial effects of the invention are as follows: the height of the microscope is reduced to 2/5 of the original height, and the microscope is convenient to carry; the included angle between the projection screen and the horizontal plane is 72 degrees, so that the projection screen is convenient for an observer to watch; the 30X, 40X, 60X and 80X objective lenses share the same rear fixed group lens, which is equivalent to the fact that the 30X, 40X, 60X and 80X objective lenses form the same objective lens, so that the consistency of the centers of the objective lenses, the accuracy and the stability of the focus can be ensured between the multiplying power switching.
Description
Technical Field
The invention relates to an optical microscope, in particular to an optical microscope, and belongs to the technical field of optics.
Background
Projection microscopes typically use a mirror that results in an overall height of the microscope that is too high and the projection plate can only be parallel to the horizontal plane, which is inconvenient for the viewer to see.
The objective lens of the microscope is divided into single parts, and the magnification is switched by the converter, so that the consistency of the center and the accuracy and stability of the focal length of the objective lens are difficult to ensure, and the machining precision of parts and machining difficulty is improved correspondingly.
Disclosure of Invention
The invention aims at overcoming the defects that in the prior art, the projection microscope is too high in height, the consistency of the center and the accuracy and the stability of the focal length of the objective lens are difficult to ensure, and the optical microscope can achieve the purposes that the height of the microscope is reduced to the original 2/5 height, the objective lens ensures the magnification switching, and the consistency of the center of the objective lens and the accuracy and the stability of the focal length are ensured.
The technical scheme adopted by the invention for realizing the purpose is as follows: an optical microscope, which is called a microscope for short, comprises a microscope base, a microscope arm, an objective table, an objective optical device, a head cover, a projection screen and a focusing hand wheel; the microscope arm is arranged above the rear part of the microscope base and fixedly connected with the rear part of the microscope base, and the objective table is arranged above the front part of the microscope base; the microscope arm comprises a front extension arm, the head cover is arranged on the upper part of the microscope and above the microscope arm, the projection screen is arranged in front of the head cover, and the focusing handwheels are arranged on two sides of the objective optical device; the objective optical device comprises a rear fixed group objective seat, a rear fixed group objective lens and a front group objective lens, wherein the front group objective lens comprises a front group objective lens A, a front group objective lens B, a front group objective lens C and a front group objective lens D; the rear fixed group objective lens seat is arranged at the upper position and downward, the rear fixed group objective lens is arranged below the rear fixed group objective lens seat and fixedly connected with the rear fixed group objective lens seat, and the objective lens optical device is arranged below the front extension arm;
The device also comprises a reflector A, a reflector B and a tooth bar; the reflector A, the reflector B and the projection screen are rectangular, the area of the projection screen is larger than that of the reflector B, and the area of the reflector B is larger than that of the reflector A; the reflector A is obliquely arranged above the objective optical device, the reflector B is arranged behind the head cover and in the vertical direction, and the projection screen is obliquely arranged above the front of the microscope;
The objective optical device also comprises a large base objective main seat, an objective conversion disc, a rotating cover and screws; the large base objective main base is of an integrated structure and comprises a large base, an objective lens barrel and a central lower protruding head; the large base is round and comprises an annular groove and a through hole; the annular groove is arranged at the lower part of the large base, the through hole is arranged at one side of the large base and below the rear fixed group objective lens, and the rear fixed group objective lens corresponds to the through hole up and down; the objective lens barrel is arranged above one side of the large base, and the lower end of the objective lens barrel is connected with the large base; the periphery of the rear fixed group objective lens seat is provided with external threads, the inner side of the upper end of the objective lens barrel is provided with internal threads matched with the external threads of the objective lens seat, and the rear fixed group objective lens seat is connected with the upper end of the objective lens barrel through the threads;
the objective lens conversion disc is of an integrated structure, and comprises an objective lens conversion disc main body, an annular protruding head, a central hole, a front group rotating objective lens seat A, a front group rotating objective lens seat B, a front group rotating objective lens seat C and a front group rotating objective lens seat D; the objective lens conversion disc main body is circular, the annular raised head is arranged at the upper part of the objective lens conversion disc main body, the annular raised head is matched with the annular groove of the large base, and the large base is movably sleeved on the annular raised head through the annular groove, so that the large base and the objective lens conversion disc can mutually rotate through the annular raised groove and the annular groove; the size of the center hole is matched with that of the center lower protruding head, the center lower protruding heads are inserted in the center hole and are in clearance fit with each other, and the objective lens conversion disc can rotate by taking the center lower protruding head as the axis through the center hole; the front group objective lens A, the front group objective lens B, the front group objective lens C and the front group objective lens D are respectively arranged in a front group rotating objective lens seat A, a front group rotating objective lens seat B, a front group rotating objective lens seat C and a front group rotating objective lens seat D;
The front group objective lens is arranged below the objective lens conversion disc, the working position of the front group objective lens is arranged below the through hole, and any one of the front group objective lens can be adjusted to the working position through the rotation of the objective lens conversion disc; an object plane is arranged below the working position of the front group objective lens, and the object plane, the working position of the front group objective lens and the rear fixed group objective lens are designed in the same vertical direction;
The objective lens magnification switching operation process of the objective lens optical device comprises the following steps: when the rotating cover is manually screwed in the clockwise direction, the front group rotating objective lens seat A, the front group rotating objective lens seat B, the front group rotating objective lens seat C and the front group rotating objective lens seat D sequentially pass through the front group objective lens working positions, and when the rotating cover is manually screwed in the anticlockwise direction, the front group rotating objective lens seat D, the front group rotating objective lens seat C, the front group rotating objective lens seat B and the front group rotating objective lens seat A sequentially pass through the front group objective lens working positions, so that the front group objective lens A, the front group objective lens B, the front group objective lens C and the front group objective lens D respectively form an objective lens optical system A, a rear fixed group objective lens optical system B, an objective lens optical system C and an objective lens optical system D with the rear fixed group objective lens; the rear fixed group objective lens is a universal lens, and the purposes of conversion of the front group objective lens and objective multiplying power switching can be achieved by only changing the front group objective lens;
An object plane is arranged on the object stage, and an image plane is formed on the projection screen; the light reflected from the object surface vertically upwards passes through the front group objective lens and the rear fixed group objective lens in sequence and then continuously upwards reaches the reflector A; the reflector A then obliquely reflects upwards and reaches the reflector B; the reflector B is obliquely reflected forwards and upwards to reach the projection screen and fills the whole projection plate on the projection screen; the rotating cover is fixedly connected with the objective lens conversion disc.
The reflector A is inclined backwards and has an included angle of 57 degrees with the horizontal direction, the reflector B has an included angle of 90 degrees with the horizontal direction, and the projection screen is inclined backwards and has an included angle of 72 degrees with the horizontal direction.
The included angle between the central line of the object plane reflected light and the incident ray on the reflector A is 114 degrees, the included angle between the central line of the object plane reflected light and the incident ray on the reflector B is 42 degrees, and the included angle between the central line of the object plane reflected light and the incident ray on the projection screen is 90 degrees.
The lens clamp is fixedly arranged on one side of the middle parts of the reflector A and the reflector B, and can clamp and fix the reflector A and the reflector B.
One side of the toothed bar is provided with a toothed bar clamping sleeve, so that the toothed bar can be positioned.
The microscope base is internally provided with an illumination light source, a battery mounting groove and a light source switch, wherein the illumination light source is arranged below the object plane, and the light source switch is electrically connected with the illumination light source and the battery mounting groove.
The effective reflecting surface of the reflector A is 45mmX62mm, the effective reflecting surface of the reflector B is 80mmX110mm, and the effective projection surface of the projection plate is 122mmX164mm.
A spring hole is formed below one side of the large base objective main seat, an annular concave table is formed above the objective conversion disc, a spring and a positioning steel ball are arranged in the spring hole, and the positioning steel ball is arranged below the spring and above the annular concave table; when the objective lens conversion disc rotates relative to the large base objective lens main base, the positioning steel ball rolls along the annular concave table.
The front group objective lens A, the front group objective lens B, the front group objective lens C and the front group objective lens D are respectively 30X front group objective lens, 40X front group objective lens, 60X front group objective lens and 80X front group objective lens; the front group rotating objective lens seat A, the front group rotating objective lens seat B, the front group rotating objective lens seat C and the front group rotating objective lens seat D are respectively a 30X front group rotating objective lens seat, a 40X front group rotating objective lens seat, a 60X front group rotating objective lens seat and an 80X front group rotating objective lens seat; the A objective optical system, the B objective optical system, the C objective optical system and the D objective optical system are respectively a 30X objective optical system, a 40X objective optical system, a 60X objective optical system and an 80X objective optical system;
the 30X front group objective lens, the 40X front group objective lens, the 60X front group objective lens and the 80X front group objective lens are different in height positions below the through hole, and the 30X front group objective lens, the 40X front group objective lens, the 60X front group objective lens and the 80X front group objective lens are arranged in sequence from low to high.
The rotating cover is of an integrated structure, the upper part of the rotating cover is a cylinder, the lower part of the rotating cover is a cone, one side of the rotating cover is provided with a fastening connection platform, and the fastening connection platform is provided with a threaded hole; the screw is screwed in the threaded hole, and the rotating cover and the objective lens conversion disc are fixedly connected and fastened together through the screw and the threaded hole; the outer side surface of the cylinder body of the rotating cover is provided with friction threads, so that the rotating cover is convenient to operate manually and screw; the objective lens barrel is provided with a rack on one side close to the upper side of the central lower convex head, the rack is arranged in the vertical direction, the toothed bar is transversely arranged in the front extending arm and meshed with the rack, and the toothed bar can move up and down under the driving of the toothed bar, so that the whole switchable objective lens optical device is driven to move up and down.
Compared with the prior art, the invention has the beneficial effects that:
The height of the Xuan microscope is reduced to 2/5 of the original height, and the Xuan microscope is convenient to carry; the included angle between the projection screen and the horizontal plane is 72 degrees, so that the projection screen is convenient for an observer to watch;
The 30X, 40X, 60X and 80X objective lenses share the same rear fixed group lens, and the rear fixed group lens is fixed on the main lens seat and keeps the position unchanged in the optical path of the whole machine, which is equivalent to the fact that the 30X, 40X, 60X and 80X objective lenses form the same objective lens, so that the consistency of the center of the objective lens, the accuracy and the stability of the focus can be ensured between the multiplying power switching.
Drawings
Fig. 1 is: front view of the invention;
Fig. 2 is: left side cross-sectional view of the invention;
Fig. 3 is: the invention discloses an optical path diagram;
fig. 4 is: an objective lens device is a front cross-sectional view;
Fig. 5 is: an objective lens device bottom view;
Fig. 6 is: a main seat of the large-base objective lens is seen in a front cross section;
Fig. 7 is: a bottom view of the main seat of the large-seat objective lens;
fig. 8 is: an objective lens changer-over plate in front view in cross section;
Fig. 9 is: an objective lens changer bottom view;
fig. 10 is: a front cross-sectional view of the rotating housing;
fig. 11 is: a rotating cover bottom view;
fig. 12 is: an enlarged view of portion a of fig. 4.
Reference numerals illustrate: rear fixed group objective lens holder 1, external screw 101, rear fixed group objective lens 2, front group objective lens A3, front group objective lens B4, front group objective lens C5, front group objective lens D6, large base objective lens holder 7, large base 701, objective lens barrel 702, center lower boss 703, annular groove 704, through hole 705, objective lens shift disk 8, objective lens shift disk body 801, annular boss 802, front group rotating objective lens holder a 803, front group rotating objective lens holder B804, front group rotating objective lens holder C805, front group rotating objective lens holder D806, center hole 807, rotating cap 9, cone 901, fastening connection platform 902, threaded hole, screw 10, rack 11, spring 12, positioning steel ball 13, microscope base 14, microscope arm 15, front boom 1501, object plane 16, object plane 1601, head housing 17, projection screen 18, image plane 1801, focusing hand wheel 19, mirror a 20, mirror B21, gear lever 22, lens clip 23, illumination light source 24, battery mounting groove 25, light source switch 26.
Detailed Description
The invention will now be further described with reference to the drawings and specific examples, which are not intended to limit the invention.
As shown in fig. 1 to 12, an optical microscope, a microscope for short, includes a microscope base 14, a microscope arm 15, a stage 16, an objective optical device, a head housing 17, a projection screen 18, and a focusing hand wheel 19; the microscope arm 15 is arranged above the rear part of the microscope base 14 and fixedly connected with the rear part of the microscope base 14, and the objective table 16 is arranged above the front part of the microscope base 14; the microscope arm 15 comprises a front extension arm 1501, the head cover 17 is arranged on the upper part of the microscope and above the microscope arm 15, the projection screen 18 is arranged in front of the head cover 17, and the focusing handwheels 19 are arranged on two sides of the objective optical device; the objective optical device comprises a rear fixed group objective seat 1, a rear fixed group objective lens 2 and a front group objective lens; the front group objective lens comprises a front group objective lens A3, a front group objective lens B4, a front group objective lens C5 and a front group objective lens D6; the rear fixed group objective lens seat 1 is arranged at an upper position and downward, the rear fixed group objective lens 2 is arranged below the rear fixed group objective lens seat 1 and fixedly connected with the rear fixed group objective lens seat, and the objective optical device is arranged below the front extending arm 1501;
The device also comprises a reflector A20, a reflector B21 and a tooth bar 22; the reflector A20, the reflector B21 and the projection screen 18 are rectangular, the area of the projection screen 18 is larger than that of the reflector B21, and the area of the reflector B21 is larger than that of the reflector A20; the reflector A20 is obliquely arranged above the objective optical device, the reflector B21 is arranged behind the head cover 17 and is vertically arranged, and the projection screen 18 is obliquely arranged above the front of the microscope;
The objective optical device also comprises a large-base objective main seat 7, an objective conversion disc 8, a rotating cover 9 and a screw 10; the large base objective main base 7 is of an integrated structure and comprises a large base 701, an objective lens barrel 702 and a central lower raised head 703; the large base 701 is circular, and the large base 701 comprises an annular groove 704 and a through hole 705; the annular groove 704 is arranged at the lower part of the large base 701, the through hole 705 is arranged at one side of the large base 701 and below the rear fixed group objective lens 2, and the rear fixed group objective lens 2 corresponds to the through hole 705 up and down; the objective lens barrel 702 is arranged above one side of the large base 701, and the lower end of the objective lens barrel 702 is connected with the large base 701; the periphery of the rear fixed group objective seat 1 is provided with an external thread 101, the inner side of the upper end of the objective tube 702 is provided with an internal thread matched with the external thread of the objective seat, and the rear fixed group objective seat 1 is in threaded connection with the upper end of the objective tube 702;
The objective lens conversion disc 8 is an integral structure, and comprises an objective lens conversion disc main body 801, an annular raised head 802, a central hole 807, a front group rotating objective lens seat A803, a front group rotating objective lens seat B804, a front group rotating objective lens seat C805 and a front group rotating objective lens seat D806; the objective lens conversion disc main body 801 is circular, the annular protruding head 802 is arranged at the upper part of the objective lens conversion disc main body 801, the annular protruding head 802 is matched with the annular groove 704 of the large base 701, the large base 701 is movably sleeved on the annular protruding head 802 through the annular groove 704, and the large base 701 and the objective lens conversion disc 8 can mutually rotate through the annular protruding groove and the annular groove 704; the size of the central hole 807 is matched with that of the central lower raised head 703, the central lower raised head 703 is inserted in the central hole 807 in clearance fit, and the objective lens conversion disc 8 can rotate by taking the central lower raised head 703 as the axis through the central hole 807; the front group objective lens A3, the front group objective lens B4, the front group objective lens C5 and the front group objective lens D6 are respectively arranged in a front group rotating objective lens seat A803, a front group rotating objective lens seat B804, a front group rotating objective lens seat C805 and a front group rotating objective lens seat D806;
The front group objective lens is arranged below the objective lens conversion disc 8, the working position of the front group objective lens is arranged below the through hole 705, and any one of the front group objective lens can be adjusted to the working position through the rotation of the objective lens conversion disc 8; an object plane is arranged below the working position of the front group objective lens, and the object plane, the working position of the front group objective lens and the rear fixed group objective lens 2 are designed in the same vertical direction;
The objective lens magnification switching operation process of the objective lens optical device comprises the following steps: when the rotating cover 9 is manually screwed in the clockwise direction, the front group rotating objective lens seat A803, the front group rotating objective lens seat B804, the front group rotating objective lens seat C805 and the front group rotating objective lens seat D806 sequentially pass through the front group objective lens working positions, and when the rotating cover 9 is manually screwed in the anticlockwise direction, the front group rotating objective lens seat D806, the front group rotating objective lens seat C805, the front group rotating objective lens seat B804 and the front group rotating objective lens seat A803 sequentially pass through the front group objective lens working positions, so that the front group objective lens A3, the front group objective lens B4, the front group objective lens C5 and the front group objective lens D6 respectively form an A objective lens optical system, a B objective lens optical system, a C objective lens optical system and a D objective lens optical system with the rear fixed group objective lens 2; the rear fixed group objective lens 2 is a universal lens, and the purposes of conversion of the front group objective lens and the objective magnification switching can be achieved by only changing the front group objective lens;
Object plane 1601 is placed on stage 16, and image plane 1801 is formed on projection screen 18; the light reflected from the object surface vertically upwards passes through the front group objective lens and the rear fixed group objective lens 2 in sequence and then continuously upwards reaches the reflector A20; the reflector A20 then obliquely reflects upwards and upwards to reach the reflector B21; the reflector B21 is reflected obliquely forwards and upwards to reach the projection screen 18, and fills the whole projection plate on the projection screen 18, so that the effect of large-screen projection is achieved.
The rotating cover 9 is fixedly connected with the objective lens conversion disc 8.
The mirror a 20 is inclined backward at an angle α of 57 ° to the horizontal, the mirror B21 is inclined at an angle β of 90 ° to the horizontal, and the projection screen 18 is inclined backward at an angle γ of 72 ° to the horizontal.
The included angle θ between the center line of the object plane reflected light and the incident line on the mirror a 20 is 114 °, the included angle δ between the center line of the object plane reflected light and the incident line on the mirror B21 is 42 °, and the included angle epsilon between the center line of the object plane reflected light and the plane of the projection screen 18 is 90 °.
The lens clamp 23 is fixedly arranged on one side of the middle parts of the reflector A20 and the reflector B21, and can clamp and fix the reflector A20 and the reflector B21.
One side of the toothed bar 22 is provided with a toothed bar 22 clamping sleeve, which can play a role in positioning the toothed bar 22.
An illumination light source 24, a battery mounting groove 25 and a light source switch 26 are arranged in the microscope base 14, the illumination light source 24 is arranged below the object plane, and the light source switch 26 is electrically connected with the illumination light source 24 and the battery mounting groove 25.
The effective reflecting surface of the reflector A20 is 45mmX62mm, the effective reflecting surface of the reflector B21 is 80mmX110mm, and the effective projection surface of the projection plate is 122mmX164mm.
A spring 12 hole is formed below one side of the large base objective main seat 7, an annular concave table is formed above the objective lens conversion disc 8, a spring 12 and a positioning steel ball 13 are arranged in the spring 12 hole, and the positioning steel ball 13 is arranged below the spring 12 and above the annular concave table; when the object lens conversion disc 8 rotates relative to the large base objective main seat 7, the positioning steel ball 13 rolls along the annular concave table, and the spring 12 can play a role in buffering.
The front group objective lens A3, the front group objective lens B4, the front group objective lens C5 and the front group objective lens D6 are respectively 30X front group objective lens, 40X front group objective lens, 60X front group objective lens and 80X front group objective lens; front group rotating objective lens seat A803, front group rotating objective lens seat B804, front group rotating objective lens seat C805, front group rotating objective lens seat D806 are respectively 30X front group rotating objective lens seat, 40X front group rotating objective lens seat, 60X front group rotating objective lens seat and 80X front group rotating objective lens seat; the A objective optical system, the B objective optical system, the C objective optical system and the D objective optical system are respectively a 30X objective optical system, a 40X objective optical system, a 60X objective optical system and an 80X objective optical system;
The 30X front group objective lens, the 40X front group objective lens, the 60X front group objective lens, and the 80X front group objective lens are different in height positions below the through hole 705, and the 30X front group objective lens, the 40X front group objective lens, the 60X front group objective lens, and the 80X front group objective lens are sequentially arranged from low to high.
The rotating cover 9 is of an integrated structure, the upper part of the rotating cover 9 is a cylinder, the lower part of the rotating cover 9 is a cone 901, one side of the rotating cover 9 is provided with a fastening connection platform 902, and the fastening connection platform 902 is provided with a threaded hole 903; the screw 10 is screwed in the threaded hole 903, and the rotating cover 9 and the objective lens conversion disc 8 are fixedly connected and fastened together through the screw 10 and the threaded hole 903; friction threads are designed on the outer side surface of the cylinder of the rotating cover 9, so that manual operation and screwing of the rotating cover 9 are facilitated; the object lens barrel 702 is provided with a rack 11 on one side above the lower center raised head 703, the rack 11 is arranged in the vertical direction, the toothed bar 22 is transversely arranged in the front extending arm 1501, the toothed bar 22 is meshed with the rack 11, and the toothed bar 22 can move up and down under the driving of the toothed bar 22, so that the whole switchable objective optical device is driven to move up and down.
The above examples are only preferred embodiments of the present invention, and common variations and substitutions by those skilled in the art within the scope of the technical solution of the present invention should be included in the scope of the present invention.
Claims (10)
1. An optical microscope, which is called a microscope for short, comprises a microscope base, a microscope arm, an objective table, an objective optical device, a head cover, a projection screen and a focusing hand wheel; the microscope arm is arranged above the rear part of the microscope base and fixedly connected with the rear part of the microscope base, and the objective table is arranged above the front part of the microscope base; the microscope arm comprises a front extension arm, the head cover is arranged on the upper part of the microscope and above the microscope arm, the projection screen is arranged in front of the head cover, and the focusing handwheels are arranged on two sides of the objective optical device; the objective optical device comprises a rear fixed group objective seat, a rear fixed group objective lens and a front group objective lens, wherein the front group objective lens comprises a front group objective lens A, a front group objective lens B, a front group objective lens C and a front group objective lens D; the rear fixed group objective lens seat is arranged at the upper position and downwards, the rear fixed group objective lens is arranged below the rear fixed group objective lens seat and fixedly connected with the rear fixed group objective lens seat, and the objective lens optical device is arranged below the front extension arm and is characterized in that:
The device also comprises a reflector A, a reflector B and a tooth bar; the reflector A, the reflector B and the projection screen are rectangular, the area of the projection screen is larger than that of the reflector B, and the area of the reflector B is larger than that of the reflector A; the reflector A is obliquely arranged above the objective optical device, the reflector B is arranged behind the head cover and in the vertical direction, and the projection screen is obliquely arranged above the front of the microscope;
The objective optical device also comprises a large base objective main seat, an objective conversion disc, a rotating cover and screws; the large base objective main base is of an integrated structure and comprises a large base, an objective lens barrel and a central lower protruding head; the large base is round and comprises an annular groove and a through hole; the annular groove is arranged at the lower part of the large base, the through hole is arranged at one side of the large base and below the rear fixed group objective lens, and the rear fixed group objective lens corresponds to the through hole up and down; the objective lens barrel is arranged above one side of the large base, and the lower end of the objective lens barrel is connected with the large base; the periphery of the rear fixed group objective lens seat is provided with external threads, the inner side of the upper end of the objective lens barrel is provided with internal threads matched with the external threads of the objective lens seat, and the rear fixed group objective lens seat is connected with the upper end of the objective lens barrel through the threads;
the objective lens conversion disc is of an integrated structure, and comprises an objective lens conversion disc main body, an annular protruding head, a central hole, a front group rotating objective lens seat A, a front group rotating objective lens seat B, a front group rotating objective lens seat C and a front group rotating objective lens seat D; the objective lens conversion disc main body is circular, the annular raised head is arranged at the upper part of the objective lens conversion disc main body, the annular raised head is matched with the annular groove of the large base, and the large base is movably sleeved on the annular raised head through the annular groove, so that the large base and the objective lens conversion disc can mutually rotate through the annular raised groove and the annular groove; the size of the center hole is matched with that of the center lower protruding head, the center lower protruding heads are inserted in the center hole and are in clearance fit with each other, and the objective lens conversion disc can rotate by taking the center lower protruding head as the axis through the center hole; the front group objective lens A, the front group objective lens B, the front group objective lens C and the front group objective lens D are respectively arranged in a front group rotating objective lens seat A, a front group rotating objective lens seat B, a front group rotating objective lens seat C and a front group rotating objective lens seat D;
The front group objective lens is arranged below the objective lens conversion disc, the working position of the front group objective lens is arranged below the through hole, and any one of the front group objective lens can be adjusted to the working position through the rotation of the objective lens conversion disc; an object plane is arranged below the working position of the front group objective lens, and the object plane, the working position of the front group objective lens and the rear fixed group objective lens are designed in the same vertical direction;
The objective lens magnification switching operation process of the objective lens optical device comprises the following steps: when the rotating cover is manually screwed in the clockwise direction, the front group rotating objective lens seat A, the front group rotating objective lens seat B, the front group rotating objective lens seat C and the front group rotating objective lens seat D sequentially pass through the front group objective lens working positions, and when the rotating cover is manually screwed in the anticlockwise direction, the front group rotating objective lens seat D, the front group rotating objective lens seat C, the front group rotating objective lens seat B and the front group rotating objective lens seat A sequentially pass through the front group objective lens working positions, so that the front group objective lens A, the front group objective lens B, the front group objective lens C and the front group objective lens D respectively form an objective lens optical system A, a rear fixed group objective lens optical system B, an objective lens optical system C and an objective lens optical system D with the rear fixed group objective lens; the rear fixed group objective lens is a universal lens, and the purposes of conversion of the front group objective lens and objective multiplying power switching can be achieved by only changing the front group objective lens;
An object plane is arranged on the object stage, and an image plane is formed on the projection screen; the light reflected from the object surface vertically upwards passes through the front group objective lens and the rear fixed group objective lens in sequence and then continuously upwards reaches the reflector A; the reflector A then obliquely reflects upwards and reaches the reflector B; the reflector B is obliquely reflected forwards and upwards to reach the projection screen and fills the whole projection plate on the projection screen; the rotating cover is fixedly connected with the objective lens conversion disc.
2. An optical microscope according to claim 1, wherein: the reflector A is inclined backwards and has an included angle of 57 degrees with the horizontal direction, the reflector B has an included angle of 90 degrees with the horizontal direction, and the projection screen is inclined backwards and has an included angle of 72 degrees with the horizontal direction.
3. An optical microscope according to claim 1, wherein: the included angle between the central line of the object plane reflected light and the incident ray on the reflector A is 114 degrees, the included angle between the central line of the object plane reflected light and the incident ray on the reflector B is 42 degrees, and the included angle between the central line of the object plane reflected light and the incident ray on the projection screen is 90 degrees.
4. An optical microscope according to claim 1, wherein: the lens clamp is fixedly arranged on one side of the middle parts of the reflector A and the reflector B, and can clamp and fix the reflector A and the reflector B.
5. An optical microscope according to claim 1, wherein: one side of the toothed bar is provided with a toothed bar clamping sleeve, so that the toothed bar can be positioned.
6. An optical microscope according to claim 1, wherein: the microscope base is internally provided with an illumination light source, a battery mounting groove and a light source switch, wherein the illumination light source is arranged below the object plane, and the light source switch is electrically connected with the illumination light source and the battery mounting groove.
7. An optical microscope according to claim 1, wherein: the effective reflecting surface of the reflector A is 45mmX62mm, the effective reflecting surface of the reflector B is 80mmX110mm, and the effective projection surface of the projection plate is 122mmX164mm.
8. An optical microscope according to claim 1, wherein: a spring hole is formed below one side of the large base objective main seat, an annular concave table is formed above the objective conversion disc, a spring and a positioning steel ball are arranged in the spring hole, and the positioning steel ball is arranged below the spring and above the annular concave table; when the objective lens conversion disc rotates relative to the large base objective lens main base, the positioning steel ball rolls along the annular concave table.
9. An optical microscope according to claim 1, wherein: the front group objective lens A, the front group objective lens B, the front group objective lens C and the front group objective lens D are respectively 30X front group objective lens, 40X front group objective lens, 60X front group objective lens and 80X front group objective lens; the front group rotating objective lens seat A, the front group rotating objective lens seat B, the front group rotating objective lens seat C and the front group rotating objective lens seat D are respectively a 30X front group rotating objective lens seat, a 40X front group rotating objective lens seat, a 60X front group rotating objective lens seat and an 80X front group rotating objective lens seat; the A objective optical system, the B objective optical system, the C objective optical system and the D objective optical system are respectively a 30X objective optical system, a 40X objective optical system, a 60X objective optical system and an 80X objective optical system;
the 30X front group objective lens, the 40X front group objective lens, the 60X front group objective lens and the 80X front group objective lens are different in height positions below the through hole, and the 30X front group objective lens, the 40X front group objective lens, the 60X front group objective lens and the 80X front group objective lens are arranged in sequence from low to high.
10. An optical microscope according to claim 1, wherein: the rotating cover is of an integrated structure, the upper part of the rotating cover is a cylinder, the lower part of the rotating cover is a cone, one side of the rotating cover is provided with a fastening connection platform, and the fastening connection platform is provided with a threaded hole; the screw is screwed in the threaded hole, and the rotating cover and the objective lens conversion disc are fixedly connected and fastened together through the screw and the threaded hole; the outer side surface of the cylinder body of the rotating cover is provided with friction threads, so that the rotating cover is convenient to operate manually and screw; the objective lens barrel is provided with a rack on one side close to the upper side of the central lower convex head, the rack is arranged in the vertical direction, the toothed bar is transversely arranged in the front extending arm and meshed with the rack, and the toothed bar can move up and down under the driving of the toothed bar, so that the whole switchable objective lens optical device is driven to move up and down.
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| CN201910483628.4A CN110187488B (en) | 2019-06-05 | 2019-06-05 | Optical microscope |
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| CN201910483628.4A CN110187488B (en) | 2019-06-05 | 2019-06-05 | Optical microscope |
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| CN110187488B true CN110187488B (en) | 2024-04-16 |
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| KR19990002482A (en) * | 1997-06-20 | 1999-01-15 | 이대원 | An image microscope |
| JP2003043374A (en) * | 2001-07-30 | 2003-02-13 | Olympus Optical Co Ltd | Microscope apparatus |
| CN102591002A (en) * | 2012-03-17 | 2012-07-18 | 扬州骄逸科技实业有限公司 | Microscope with function of protecting objective lenses |
| CN103913830A (en) * | 2014-03-16 | 2014-07-09 | 陈琳琳 | Cassette microscope |
| CN209962003U (en) * | 2019-06-05 | 2020-01-17 | 宁波湛京光学仪器有限公司 | Optical microscope |
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2019
- 2019-06-05 CN CN201910483628.4A patent/CN110187488B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990002482A (en) * | 1997-06-20 | 1999-01-15 | 이대원 | An image microscope |
| JP2003043374A (en) * | 2001-07-30 | 2003-02-13 | Olympus Optical Co Ltd | Microscope apparatus |
| CN102591002A (en) * | 2012-03-17 | 2012-07-18 | 扬州骄逸科技实业有限公司 | Microscope with function of protecting objective lenses |
| CN103913830A (en) * | 2014-03-16 | 2014-07-09 | 陈琳琳 | Cassette microscope |
| CN209962003U (en) * | 2019-06-05 | 2020-01-17 | 宁波湛京光学仪器有限公司 | Optical microscope |
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