CN105869494A - Focal distance determination device of concave lens - Google Patents
Focal distance determination device of concave lens Download PDFInfo
- Publication number
- CN105869494A CN105869494A CN201610452498.4A CN201610452498A CN105869494A CN 105869494 A CN105869494 A CN 105869494A CN 201610452498 A CN201610452498 A CN 201610452498A CN 105869494 A CN105869494 A CN 105869494A
- Authority
- CN
- China
- Prior art keywords
- light source
- slide bar
- base
- determinator
- focal distance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/22—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for optics
Abstract
The invention discloses a focal distance determination device of a concave lens. The focal distance determination device comprises a base, wherein the base is supported through leveling bolts and is fixedly provided with a light source mounting plate, a slide rod and a graduated scale; the slide rod and the graduated scale are parallel to each other; the slide rod is provided with three slide sleeves; the three slide sleeves are provided with locking bolts used for fixing positions on the slide rod, are arrayed in sequence from left to right and are provided with a convex lens mounting frame, a concave lens mounting frame and a light screen, respectively; the left side face of the light source mounting plate is fixedly provided with a light source through a light source fixing frame; the light source mounting plate is provided with a light-transmitting hole; a light source is just aligned to the light-transmitting hole of the light source mounting plate; the axis of the light-transmitting hole is located over the slide rod and is parallel to the slide rod. The focal distance determination device of the concave lens can be used for measuring a focal distance of the convex lens and a virtual image position is convenient to determine; and the focal distance determination device is convenient to operate, small in determination errors and good in expandability.
Description
Technical field
The present invention relates to a kind of experimental provision, be specifically related to a kind of Concave Mirrors Focus determinator.
Background technology
The focal length of concavees lens why difficult measurement is because the light that material object sends and can send out after the refraction of concavees lens
Dissipating, will not form real image, virtual image optical screen does not receives, and therefore position is bad determines, this gives concavees lens
Focal length determination brings great inconvenience.
Summary of the invention
The purpose of the present invention is that provides a kind of Concave Mirrors Focus determinator to solve the problems referred to above.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of Concave Mirrors Focus determinator, including base, described base passes through leveling bolt support, described
Being fixedly installed light source installing plate, slide bar and rule on base, described slide bar is the most flat with described rule
OK, described slide bar is provided with three sliding sleeves, and three described sliding sleeves are provided with for fixing on described slide bar
The clamping screw of position, three described sliding sleeves array from left to right and be respectively arranged with convex lens installing rack,
Concavees lens installing rack and optical screen, the left surface of described light source installing plate is installed with light by light source fixing frame
Source, described light source installing plate is provided with loophole, described light source just loophole to described light source installing plate,
The axis of described loophole is positioned at the surface of described slide bar, and the axis of described loophole is mutual with described slide bar
Parallel.
Preferably, described slide bar is fixedly installed on described base by fixture block, and described rule is pasted onto institute
State on base.
Preferably, described convex lens installing rack and described concavees lens installing rack are height and angle adjustable formula
Structure.
Preferably, described slide bar is made up of the water pipe of plastic material.
Preferably, described light source installing plate and described base are wooden structures.
The beneficial effects of the present invention is:
The present invention can be used to measure the focal length of convex lens, it is simple to determines virtual image position, easy to operate, measures
Error is little, and extensibility is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of Concave Mirrors Focus determinator of the present invention；
Fig. 2 is the measure and calculation schematic diagram of the present invention；
In figure: 1-base, 2-leveling bolt, 3-fixture block, 4-slide bar, 5-rule, 6-concavees lens installing rack,
7-concavees lens, 8-convex lens, 9-convex lens installing rack, 10-sliding sleeve, 11-clamping screw, 12-light source fixing frame,
13-light source, 14-light source installing plate, 15-optical screen.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
As it is shown in figure 1, the present invention includes that base 1, base 1 are supported by leveling bolt 2, solid on base 1
Surely being provided with light source installing plate 14, slide bar 4 and rule 5, slide bar 4 is parallel to each other with rule 5, sliding
Bar 4 is provided with three sliding sleeves 10, and three sliding sleeves 10 are provided with for the locking of fixed position on slide bar 4
Bolt 11, three sliding sleeves 10 array from left to right and are respectively arranged with convex lens installing rack 9, concavees lens
Installing rack 6 and optical screen 15, the left surface of light source installing plate 14 is installed with light by light source fixing frame 12
Source 13, light source installing plate 14 is provided with loophole, light source 13 just loophole to light source installing plate 14, thoroughly
The axis of unthreaded hole is positioned at the surface of slide bar 4, and the axis of loophole is parallel to each other with slide bar 4.
Slide bar 4 is fixedly installed on base 1 by fixture block 3, and rule 5 is pasted onto on base 1.Scale
Chi 5 is parallel to slide bar 4, sticks with glue fixing, is positioned at the lower section of slide bar 4, the most relatively side, it is simple to read
Number.
Convex lens installing rack 9 and concavees lens installing rack 6 are height and adjustable angle section type structure, it is simple to will
The relative position adjustments of light source 13, convex lens 8 and concavees lens 7 is to optimal.
Slide bar 4 is made up of the water pipe of plastic material, can either meet needs, and cost of manufacture is low.
Light source installing plate 14 and base 1 are wooden structures.
As in figure 2 it is shown, the principle of Concave Mirrors Focus determinator of the present invention is as follows:
The basis of the design is all based on Fermat's principle, applies dioptric imaging feature, simply determines object image distance.
The Gauss formula of main application lens imaging is:Wherein f' is the focal length of lens, and S is object distance,
S' is image distance.
During measurement, by leveling bolt by base leveling, concavees lens installing rack fixes concavees lens,
Fixing convex lens on convex lens installing rack, then open light source, light passes from the loophole of light source installing plate,
Through convex lens L1The convergence of rays that P in kind is sent, is allowed to image in a P ' (available optical screen finds real image),
Then at convex lens L1And between a P ', adding concavees lens L to be measured, convergent beam is after concavees lens L refraction dissipates
Form new picture point P " (being still real image).P ', P is write down respectively by rule " and concavees lens L
Position, then object distanceImage distanceSubstitute into Gauss formulaIn, can obtain recessed
The focal length of mirror.
The invention have the advantages that
1) can be used to measure the focal length of convex lens, study the imaging characteristics of lens and demonstrate some conventional works
The operation principle of tool, such as: photographing unit, glasses, telescope etc.；
2) evaluated error is little, for less than 3%；
3) extensibility is good, as long as this device changes the hole of baffle plate as be suitable for the thin seam of size into, adds on pole
Add a screen, it is possible to for the phenomenon of single slit diffraction, i.e. diffraction experiment by narrow opening；
4) easy to operate, it is simple to determine virtual image position.
5) light source installing plate 14, convex lens installing rack 9, concavees lens installing rack 6, optical screen 15 is set to coaxially,
It is easy to regulation.
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Any amendment, equivalent and the improvement etc. made within spirit and principle, should be included in the guarantor of the present invention
In the range of protecting.
Claims (5)
1. a Concave Mirrors Focus determinator, it is characterised in that: include that base, described base pass through leveling
Bolt support, described base is fixedly installed light source installing plate, slide bar and rule, described slide bar and institute
Stating rule to be parallel to each other, described slide bar is provided with three sliding sleeves, three described sliding sleeves be provided with for
The clamping screw of fixed position on described slide bar, three described sliding sleeves array from left to right and are respectively provided with
Having convex lens installing rack, concavees lens installing rack and optical screen, the left surface of described light source installing plate is solid by light source
Determining frame and be installed with light source, described light source installing plate is provided with loophole, and described light source is just to described light source
The loophole of installing plate, the axis of described loophole is positioned at the surface of described slide bar, the axle of described loophole
Line is parallel to each other with described slide bar.
Concave Mirrors Focus determinator the most according to claim 1, it is characterised in that: described slide bar leads to
Crossing fixture block to be fixedly installed on described base, described rule is pasted onto on described base.
Concave Mirrors Focus determinator the most according to claim 1, it is characterised in that: described convex lens
Installing rack and described concavees lens installing rack are height and adjustable angle section type structure.
Concave Mirrors Focus determinator the most according to claim 1, it is characterised in that: described slide bar by
The water pipe of plastic material is made.
Concave Mirrors Focus determinator the most according to claim 1, it is characterised in that: described light source is pacified
Dress plate and described base are wooden structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610452498.4A CN105869494A (en) | 2016-06-21 | 2016-06-21 | Focal distance determination device of concave lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610452498.4A CN105869494A (en) | 2016-06-21 | 2016-06-21 | Focal distance determination device of concave lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105869494A true CN105869494A (en) | 2016-08-17 |
Family
ID=56651213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610452498.4A Pending CN105869494A (en) | 2016-06-21 | 2016-06-21 | Focal distance determination device of concave lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105869494A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2154733Y (en) * | 1993-05-06 | 1994-02-02 | 陈南宁 | Combined toy for optical teaching |
| CA2469453C (en) * | 2001-12-11 | 2009-02-03 | Bausch & Lomb Incorporated | Model eye and aberrometer calibration method |
| CN203386403U (en) * | 2013-08-16 | 2014-01-08 | 浙江工贸职业技术学院 | Optical imaging demonstration instrument |
| CN203455995U (en) * | 2013-09-13 | 2014-02-26 | 孙忠杰 | Convex lens imaging experimental device |
| CN103076157B (en) * | 2013-01-05 | 2015-02-18 | 山西省电力公司大同供电分公司 | Automatic measuring device and method for focal distance of thin concave lens |
| CN205318726U (en) * | 2016-02-01 | 2016-06-15 | 卜旭洋 | Optics presentation device for physics experiments |
| CN206210223U (en) * | 2016-06-21 | 2017-05-31 | 商洛学院 | Concave Mirrors Focus determine device |
-
2016
- 2016-06-21 CN CN201610452498.4A patent/CN105869494A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2154733Y (en) * | 1993-05-06 | 1994-02-02 | 陈南宁 | Combined toy for optical teaching |
| CA2469453C (en) * | 2001-12-11 | 2009-02-03 | Bausch & Lomb Incorporated | Model eye and aberrometer calibration method |
| CN103076157B (en) * | 2013-01-05 | 2015-02-18 | 山西省电力公司大同供电分公司 | Automatic measuring device and method for focal distance of thin concave lens |
| CN203386403U (en) * | 2013-08-16 | 2014-01-08 | 浙江工贸职业技术学院 | Optical imaging demonstration instrument |
| CN203455995U (en) * | 2013-09-13 | 2014-02-26 | 孙忠杰 | Convex lens imaging experimental device |
| CN205318726U (en) * | 2016-02-01 | 2016-06-15 | 卜旭洋 | Optics presentation device for physics experiments |
| CN206210223U (en) * | 2016-06-21 | 2017-05-31 | 商洛学院 | Concave Mirrors Focus determine device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |
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| RJ01 | Rejection of invention patent application after publication |