CN103076157A - Automatic measuring device and method for focal distance of thin concave lens - Google Patents
Automatic measuring device and method for focal distance of thin concave lens Download PDFInfo
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- CN103076157A CN103076157A CN2013100021520A CN201310002152A CN103076157A CN 103076157 A CN103076157 A CN 103076157A CN 2013100021520 A CN2013100021520 A CN 2013100021520A CN 201310002152 A CN201310002152 A CN 201310002152A CN 103076157 A CN103076157 A CN 103076157A
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Abstract
The invention discloses an automatic measuring device and method for focal distance of a thin concave lens. The imaging clearness is accurately judged through light intensity detection, so that the measuring accuracy of the focal distance of the thin concave lens is effectively improved. The technique disclosed by the invention is advanced and reasonable, the automation level is high, the measurement is rapid and accurate and the technique is an effective automatic measuring technique for the focal distance of the thin concave lens.
Description
Technical field
The invention belongs to design and the manufacturing technology field of physical experiment apparatus, relate in particular to a kind of thin Concave Mirrors Focus automatic measurement technology.
Background technology
In Experiment of College Physics, the measurement of focal distance of thin convex lens is the most basic experiment.Measuring method commonly used has: autocollimatic method, object distance-image distance method, Conjugate method and lens combination are legal.The focal length of measuring thin concavees lens mainly adopts lens combination legal.No matter which kind of method all needs human eye to go to judge the readability of imaging, and then determines picture screen position.Because individual's visual custom is different and the restriction of aberration, therefore, as the screen position, be difficult to accurately determine, the precision of measurement result is generally not high.What light source, thing screen and picture screen were chosen in addition is different, also can bring on the judgement of imaging clearly degree certain impact.In sum, if these influence factor stacks, larger error may appear in measurement result.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of thin Concave Mirrors Focus automatic measurement technology, effectively improve the measuring accuracy of thin Concave Mirrors Focus.
According to an aspect of the present invention, a kind of thin Concave Mirrors Focus self-operated measuring unit is provided, described device comprises: led light source, light source filter, black thing screen with holes, slidably baffle plate, convex lens, concavees lens draw-in groove, light intensity sensor, black picture screen, drive link, motor, LCDs, cpu controller, starting switch, ultrasonic distance-measuring sensor, operation base and support, crust of the device and status indicator lamp, wherein
Described cpu controller is the central controller of described device, is responsible for the processing of all input data and the output of control signal, and it is embodied as the main control board in the described device;
Described led light source provides light source for described device under the control of described cpu controller;
Described light source filter is convex lens, and described led light source is arranged on the focal plane of described light source filter, to guarantee to be mapped to light on the described black thing screen with holes as parallel rays;
Described black thing screen with holes is a black panel with 1 font hole;
Described slidably baffle plate is used for making interior each optical device of described device to seal with respect to the external world, thereby makes the Concave Mirrors Focus measuring process can not be subject to the impact of extraneous light;
Described convex lens are used for forming compound lens with concavees lens to be measured, thereby carry out the measurement of Concave Mirrors Focus;
Described concavees lens draw-in groove is half circular draw-in groove, is used for holding concavees lens to be measured;
Described light intensity sensor is attached on the described black picture screen, carries out the detection of light intensity under the control of described cpu controller, and testing result is delivered to described cpu controller process;
Described black picture screen is fixed on the described drive link, can move with described drive link;
Described motor drives the movement of described drive link under the control of described cpu controller;
Described drive link is threaded, and drives described black picture screen fixed thereon mobile under the driving of described motor;
Described ultrasonic distance-measuring sensor is fixed on the lower end of described black thing screen with holes, in the distance of measuring under the control of described cpu controller between described black thing screen with holes and the described black picture screen, and measurement result is delivered to described cpu controller process;
Described operation base and support are supported each optical device of described device, and guarantee that the photocentre of each optical device all is in sustained height;
Described LCDs numeral under the control of described cpu controller shows the focal length of the concavees lens of surveying;
Described status indicator lamp is indicated the running status of each controllable component in the described device under the control of described cpu controller;
Described starting switch is used for connecting the power supply of described device to start described device; And
Described crust of the device provides mechanical protection for the optical device in the described device and miscellaneous part.
According to another aspect of the present invention, also provide a kind of thin Concave Mirrors Focus method for automatic measurement, described method comprises the steps:
Step 1: concavees lens to be measured are clipped on the concavees lens draw-in groove;
Step 2: after concavees lens to be measured folder is steady, slide slidably that baffle plate makes each optical device seal with respect to the external world, thereby make measuring process not be subjected to external light influence;
Step 3:CPU controller triggers led light source work, and the led light source emitted light becomes parallel rays behind the light source filter, and 1 font hole on black thing screen with holes evenly is mapped on the convex lens to be measured again, and imaging on black picture screen;
Step 4: light intensity sensor detects the intensity of illumination that black picture screen receives, black picture screen on the motor drives drive link is mobile simultaneously, when light intensity sensor detects the light intensity maximum for the first time, brake motor is mobile to stop black picture screen, and start the ultrasonic distance-measuring sensor range finding, thereby obtain the first distance b that black thing with holes shields black picture screen;
Step 5: the black picture screen on the motor drives drive link continues to move right, when light intensity sensor detects the light intensity maximum for the second time, it is mobile that brake motor stops black picture screen again, and again start the sound ranging sensor instrument distance, thereby obtain black thing with holes shield black picture screen second distance c; And
Step 6:CPU controller calculates the focal length of concavees lens to be measured,
Wherein, in described step 6, the formula of the focal length of employed measurement concavees lens is:
Wherein, a is the fixed range that black thing with holes shields the concavees lens draw-in groove, and b is resulting the first distance in step 4, and c is resulting second distance in step 5, utilizes above-mentioned formula to calculate the focal distance f of concavees lens to be measured.
Preferably, described method also comprise step 7:CPU controller with the Concave Mirrors Focus that calculates in the liquid crystal display screen display.
According to technique scheme, the present invention accurately judges the readability of imaging by the detection of light intensity, thereby has effectively improved the measuring accuracy of thin Concave Mirrors Focus.Advanced technology of the present invention is reasonable, and automaticity is high, measure quick and precisely, and be a kind of effective thin Concave Mirrors Focus automatic measurement technology.
Description of drawings
Fig. 1 is the schematic diagram in kind of thin Concave Mirrors Focus self-operated measuring unit in the specific embodiment of the invention;
Fig. 2 is the functional structure chart of thin Concave Mirrors Focus self-operated measuring unit in the specific embodiment of the invention;
Fig. 3 is the flow chart of steps of thin Concave Mirrors Focus method for automatic measurement in the specific embodiment of the invention.
Embodiment
Fig. 1 is the schematic diagram in kind of thin Concave Mirrors Focus self-operated measuring unit in the specific embodiment of the invention.As shown in Figure 1, the thin Concave Mirrors Focus self-operated measuring unit in the specific embodiment of the invention comprises: led light source 1, light source filter 2, black thing screen 3 with holes, slidably baffle plate 4, convex lens 5, concavees lens draw-in groove 6, light intensity sensor 7, black picture screen 8, drive link 9, motor 10, LCDs 11, cpu controller 12, starting switch 13, ultrasonic distance-measuring sensor 14, operation base and support 15, crust of the device 16 and status indicator lamp 17 etc.
Fig. 2 is the functional structure chart of thin Concave Mirrors Focus self-operated measuring unit in the specific embodiment of the invention.Band arrow dotted line among the figure between each parts represents that light injects the path, represents the transmission path of control signal or data-signal with the arrow solid line, and the solid line with arrow does not represent that certain annexation is arranged between parts physically.
Below just do further introduction in conjunction with the vitals of thin Concave Mirrors Focus self-operated measuring unit in Fig. 1, the 2 pairs of embodiments.
Fig. 3 is the flow chart of steps of thin Concave Mirrors Focus method for automatic measurement in the specific embodiment of the invention.The party's ratio juris is: if not fogging clear, particularly during edge fog, would be because the light that marginal point in kind sends does not converge on the picture screen causes.Therefore when clear picture, illumination intensity was for maximum when namely light converged at as screen upward.
As shown in Figure 3, the thin Concave Mirrors Focus method for automatic measurement in the embodiment comprises the steps:
Step 1: concavees lens to be measured are clipped on the concavees lens draw-in groove.
Step 2: after concavees lens to be measured folder is steady, slide slidably that baffle plate makes each optical device seal with respect to the external world, thereby make measuring process not be subjected to external light influence.
Step 3:CPU controller triggers led light source work, and the led light source emitted light becomes parallel rays behind the light source filter, and 1 font hole on black thing screen with holes evenly is mapped on the convex lens to be measured again, and imaging on black picture screen.
Step 4: light intensity sensor detects the intensity of illumination that black picture screen receives, black picture screen on the motor drives drive link is mobile simultaneously, when light intensity sensor detects the light intensity maximum for the first time, the real image (being equivalent to a virtual object for concavees lens to be measured) that to be light form through convex lens black look like to shield into clearly as the time, brake motor is mobile to stop black picture screen, and start the ultrasonic distance-measuring sensor range finding, thereby obtain the first distance b that black thing with holes shields black picture screen.
Step 5: the black picture screen on the motor drives drive link continues to move right, when light intensity sensor detects the light intensity maximum for the second time, it is mobile that brake motor stops black picture screen again, and again start the sound ranging sensor instrument distance, thereby obtain black thing with holes shield black picture screen second distance c.
Step 6:CPU controller calculates the focal length of concavees lens to be measured.
Particularly, because operation base and the support of apparatus of the present invention guarantee that each optical device photocentre is in sustained height, and led light source, light source filter, black thing screen with holes, convex lens and concavees lens draw-in groove all be in a fixed position, so the distance that black thing with holes shields the concavees lens draw-in groove is certain value a.According to recessed the thin-lens equation (1):
Wherein, u is object distance, and v is image distance, obtains the formula (2) of the employed measurement Concave Mirrors Focus of apparatus of the present invention:
Based on a value, in step 4 resulting the first distance b and in step 5 resulting second distance c, utilize above-mentioned formula (2) can calculate the focal distance f of concavees lens to be measured.
Preferably, this method can also comprise step 7, cpu controller with the Concave Mirrors Focus that calculates in the liquid crystal display screen display.
According to technique scheme, the present invention accurately judges the readability of imaging by the detection of light intensity, thereby has effectively improved the measuring accuracy of thin Concave Mirrors Focus.Advanced technology of the present invention is reasonable, and automaticity is high, measure quick and precisely, and be a kind of effective thin Concave Mirrors Focus automatic measurement technology.
Claims (3)
1. thin Concave Mirrors Focus self-operated measuring unit, it is characterized in that, described device comprises: led light source, light source filter, black thing screen with holes, slidably baffle plate, convex lens, concavees lens draw-in groove, light intensity sensor, black picture screen, drive link, motor, LCDs, cpu controller, starting switch, ultrasonic distance-measuring sensor, operation base and support, crust of the device and status indicator lamp, wherein
Described cpu controller is the central controller of described device, is responsible for the processing of all input data and the output of control signal, and it is embodied as the main control board in the described device;
Described led light source provides light source for described device under the control of described cpu controller;
Described light source filter is convex lens, and described led light source is arranged on the focal plane of described light source filter, to guarantee to be mapped to light on the described black thing screen with holes as parallel rays;
Described black thing screen with holes is a black panel with 1 font hole;
Described slidably baffle plate is used for making interior each optical device of described device to seal with respect to the external world, thereby makes the Concave Mirrors Focus measuring process can not be subject to the impact of extraneous light;
Described convex lens are used for forming compound lens with concavees lens to be measured, thereby carry out the measurement of Concave Mirrors Focus;
Described concavees lens draw-in groove is half circular draw-in groove, is used for holding concavees lens to be measured;
Described light intensity sensor is attached on the described black picture screen, carries out the detection of light intensity under the control of described cpu controller, and testing result is delivered to described cpu controller process;
Described black picture screen is fixed on the described drive link, can move with described drive link;
Described motor drives the movement of described drive link under the control of described cpu controller;
Described drive link is threaded, and drives described black picture screen fixed thereon mobile under the driving of described motor;
Described ultrasonic distance-measuring sensor is fixed on the lower end of described black thing screen with holes, in the distance of measuring under the control of described cpu controller between described black thing screen with holes and the described black picture screen, and measurement result is delivered to described cpu controller process;
Described operation base and support are supported each optical device of described device, and guarantee that the photocentre of each optical device all is in sustained height;
Described LCDs numeral under the control of described cpu controller shows the focal length of the concavees lens of surveying;
Described status indicator lamp is indicated the running status of each controllable component in the described device under the control of described cpu controller;
Described starting switch is used for connecting the power supply of described device to start described device; And
Described crust of the device provides mechanical protection for the optical device in the described device and miscellaneous part.
2. a thin Concave Mirrors Focus method for automatic measurement is characterized in that, described method comprises the steps:
Step 1: concavees lens to be measured are clipped on the concavees lens draw-in groove;
Step 2: after concavees lens to be measured folder is steady, slide slidably that baffle plate makes each optical device seal with respect to the external world, thereby make measuring process not be subjected to external light influence;
Step 3:CPU controller triggers led light source work, and the led light source emitted light becomes parallel rays behind the light source filter, and 1 font hole on black thing screen with holes evenly is mapped on the convex lens to be measured again, and imaging on black picture screen;
Step 4: light intensity sensor detects the intensity of illumination that black picture screen receives, black picture screen on the motor drives drive link is mobile simultaneously, when light intensity sensor detects the light intensity maximum for the first time, brake motor is mobile to stop black picture screen, and start the ultrasonic distance-measuring sensor range finding, thereby obtain the first distance b that black thing with holes shields black picture screen;
Step 5: the black picture screen on the motor drives drive link continues to move right, when light intensity sensor detects the light intensity maximum for the second time, it is mobile that brake motor stops black picture screen again, and again start the sound ranging sensor instrument distance, thereby obtain black thing with holes shield black picture screen second distance c; And
Step 6:CPU controller calculates the focal length of concavees lens to be measured,
Wherein, in described step 6, the formula of the focal length of employed measurement concavees lens is:
Wherein, a is the fixed range that black thing with holes shields the concavees lens draw-in groove, and b is resulting the first distance in step 4, and c is resulting second distance in step 5, utilizes above-mentioned formula to calculate the focal distance f of concavees lens to be measured.
3. method according to claim 2 is characterized in that, described method also comprise step 7:CPU controller with the Concave Mirrors Focus that calculates in the liquid crystal display screen display.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741660A (en) * | 2016-04-29 | 2016-07-06 | 江南大学 | Image screen for lens imaging experiments |
| CN110296819A (en) * | 2019-07-31 | 2019-10-01 | 福建师范大学 | A kind of measurement method measuring Concave Mirrors Focus |
| CN110390833A (en) * | 2019-06-03 | 2019-10-29 | 杭州电子科技大学 | A kind of traffic instruction facility occlusion detection method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869494A (en) * | 2016-06-21 | 2016-08-17 | 商洛学院 | Focal distance determination device of concave lens |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05142094A (en) * | 1991-11-15 | 1993-06-08 | Masuo Nagasaka | Device for measuring focal distance of concave lens |
| CN1119768A (en) * | 1994-07-28 | 1996-04-03 | 三星电子株式会社 | Method and apparatus for focusing control |
| JP2000155071A (en) * | 1998-11-19 | 2000-06-06 | Omron Corp | Focal distance measuring device and focal distance measuring method |
| CN102494639A (en) * | 2011-10-18 | 2012-06-13 | 北京理工大学 | Laser divergence angle measuring device and measuring method based on full-automatic hole alignment method |
| CN203037448U (en) * | 2013-01-05 | 2013-07-03 | 山西省电力公司大同供电分公司 | Automatic focal length measurement device for thin concave lens |
-
2013
- 2013-01-05 CN CN201310002152.0A patent/CN103076157B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05142094A (en) * | 1991-11-15 | 1993-06-08 | Masuo Nagasaka | Device for measuring focal distance of concave lens |
| CN1119768A (en) * | 1994-07-28 | 1996-04-03 | 三星电子株式会社 | Method and apparatus for focusing control |
| JP2000155071A (en) * | 1998-11-19 | 2000-06-06 | Omron Corp | Focal distance measuring device and focal distance measuring method |
| CN102494639A (en) * | 2011-10-18 | 2012-06-13 | 北京理工大学 | Laser divergence angle measuring device and measuring method based on full-automatic hole alignment method |
| CN203037448U (en) * | 2013-01-05 | 2013-07-03 | 山西省电力公司大同供电分公司 | Automatic focal length measurement device for thin concave lens |
Non-Patent Citations (4)
| Title |
|---|
| 宋景萍等: "薄透镜焦距测量的教学设计", 《贵州教育学院学报（自然科学）》 * |
| 尹殿云: "《医用物理试验》", 31 August 1999 * |
| 李山东等: "薄透镜焦距测量中的测量条件选择", 《大学物理实验》 * |
| 李淑云: "辅助透镜成像法测凹透镜焦距方法的改进", 《渭南师专学报（自然科学版）》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741660A (en) * | 2016-04-29 | 2016-07-06 | 江南大学 | Image screen for lens imaging experiments |
| CN110390833A (en) * | 2019-06-03 | 2019-10-29 | 杭州电子科技大学 | A kind of traffic instruction facility occlusion detection method |
| CN110296819A (en) * | 2019-07-31 | 2019-10-01 | 福建师范大学 | A kind of measurement method measuring Concave Mirrors Focus |
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