CN203100685U - Lens center thickness optical detector - Google Patents

Abstract

The utility model discloses a lens center thickness optical detector which comprises a bracket, a light source, an optical path device, a detector, a vertical mobile device, a carrying platform and a client terminal. The vertical mobile device is connected with the bracket. The optical path device is connected with the vertical mobile device. The optical path device comprises a light splitting device and an optical probe. The light splitting device is connected with the light source and the detector through a Y shaped optical fiber. The detector is connected with the client terminal through a data line. The client terminal is internally installed with analysis software. The carrying platform is provided with a lens fixing seat which is arranged just under the optical path device. The lens center thickness optical detector of the utility model can simply and rapidly measure the center thickness of a lens through an optical principle, the detection is non-contact detection, and the parts are not damaged.

Description

The lens center thickness optical detector

Technical field

The utility model relates to eyeglass checkout equipment field, particularly a kind of lens center thickness optical detector.

Background technology

In optical field, the detection of lens has the significance of decision optical effect, and the measurement of the center thickness of lens is most important things wherein, and is particularly strict to the accuracy requirement of lens for fields such as photo-etching machine objective lens, camera spaces.

The method of existing measurement lens center thickness comprises two kinds of contact type measurement and non-contact measurements.

Contact type measurement generally uses milscale or clock gauge to measure.Center thickness often is very difficult to align central point when measuring lens, and speed is very slow, and is easy in the measuring process just damage lens, causes lens unavailable.

And contactless measurement, image measurement method, coplane capacitance method, the confocal method of white light and the interferometric method etc. of comprising commonly used, yet along with more and more higher to the requirement of aspects such as degree of accuracy, anti-interference and efficient in the industry now, all there is defective in these methods, can't all reach requirement.

The utility model content

The purpose of this utility model provides a kind of lens center thickness optical detector.

According to an aspect of the present utility model, a kind of lens center thickness optical detector is provided, comprise support, light source, light path device, detecting device, longitudinal moving device, objective table and client terminal, longitudinal moving device is connected with support, light path device is connected with longitudinal moving device, light path device comprises light-dividing device and optic probe, light-dividing device connects light source and detecting device by optical fiber, detecting device connects client terminal by data line, analysis software is installed in the client terminal, objective table is provided with lens permanent seat, lens permanent seat be located at light path device under.Thus, disclose a kind of efficient, accurately, lens center thickness detecting instrument that antijamming capability is strong.

In some embodiments, optical fiber is Y shape, more convenient connection light source and detecting device.

In some embodiments, optic probe comprises first eyeglass, second eyeglass, prismatic glasses, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass that is arranged in order from bottom to top, first eyeglass and prismatic glasses are the arc convex lens, second eyeglass is concavees lens, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass are convex lens, first eyeglass, second eyeglass, prismatic glasses, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass are optical glass of the same race, thus, optic probe can make light refraction shine lens surface to be measured.

In some embodiments, light path device also comprises stationary magazine creel, stationary magazine creel is a cylindrical shape, light-dividing device is located at stationary magazine creel upper end circle centre position, optic probe is located at the bottom of stationary magazine creel, the central lines of the center line of optic probe and first eyeglass, second eyeglass, prismatic glasses, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass thus, forms and measures light path.

In some embodiments, longitudinal moving device comprise the rotation axis that vertical ground and two ends and support be rotationally connected, the gear of fixedlying connected rotation axis and with the adjusting gear of gearing mesh, the rotation axis outside is provided with screw thread, the rotation axis outside also is arranged with axle sleeve, be provided with screw thread in the axle sleeve with the engagement of rotation axis external screw-thread, axle sleeve is fixedly connected with catch bar, catch bar is connected with slide block, slide block is fixedly connected with clamp device, the fixedly connected light path device of clamp device, thus, longitudinal moving device can regulate light path device and lenticular spacing to be measured from.

Description of drawings

Fig. 1 is the structural representation of the utility model lens center thickness optical detector;

Fig. 2 is the thickness measure principle schematic of plano-concave lens.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 has schematically shown the utility model lens center thickness optical detector.

As shown in Figure 1, the lens center thickness optical detector, comprise support 1, the longitudinal moving device that connects support 1, light source 2, the light path device 3 that connects longitudinal moving device, detecting device 4, connect the objective table 5 of support 1 and the client terminal 6 of connection detector 4, light path device 3 comprises light-dividing device 7 and optic probe 8, light-dividing device 7 connects light source 2 and detecting device 4 by optical fiber 18, optical fiber 18 is Y shape, two branching of Y shape optical fiber 18 connect light source 2 and detecting device 4 respectively, light-dividing device 7 is provided with two luminous points, detecting device 4 connects client terminal 6 by data line, in the client terminal 6 analysis software is installed, objective table 5 is provided with lens permanent seat 9, lens permanent seat 9 be located at light path device 3 under.

Light path device 3 also comprises stationary magazine creel 10, stationary magazine creel 10 is a cylindrical shape, light-dividing device 7 is located at stationary magazine creel 10 upper end circle centre positions, optic probe 8 is located at the bottom of stationary magazine creel 10, optic probe 8 comprises first eyeglass 81 that is arranged in order from bottom to top, second eyeglass 82, prismatic glasses 83, the 4th eyeglass 84, the 5th eyeglass 85 and the 6th eyeglass 86, described first eyeglass 81 and prismatic glasses 83 are the arc convex lens, second eyeglass 82 is concavees lens, the 4th eyeglass 84, the 5th eyeglass 85 and the 6th eyeglass 86 are convex lens, first eyeglass 81, second eyeglass 82, prismatic glasses 83, the 4th eyeglass 84, the 5th eyeglass 85 and the 6th eyeglass 86 are optical glass of the same race, the center line of optic probe 8 and first eyeglass 81, second eyeglass 82, prismatic glasses 83, the 4th eyeglass 84, the central lines of the 5th eyeglass 85 and the 6th eyeglass 86.

Longitudinal moving device comprises the rotation axis 11 that vertical ground and two ends and support 1 are rotationally connected, the gear 12 of fixedly connected rotation axis 11 and the adjusting gear 13 that meshes with gear 12, rotation axis 11 tops are provided with screw thread, rotation axis 11 outsides also are arranged with axle sleeve 14, be provided with screw thread in the axle sleeve 14 with the engagement of rotation axis 11 outside screw, axle sleeve 14 is fixedly connected with catch bar 15, catch bar 15 is connected with slide block 16, slide block 16 is fixedly connected with clamp device 17, clamp device 17 fixedly connected light path devices 3, longitudinal moving device also comprises axle sleeve 14, catch bar 15, slide block 16 and clamp device 17.

Needs regulate 19 on light path device 3 and lens to be measured apart from the time, rotating adjusting gear 13 makes adjusting gear 13 drive rotation axis 11 rotations, thread belt moving axis on the rotation axis 11 overlaps 14 upper and lower moving, axle sleeve 14 drives catch bar 15, catch bar 15 drives slide block 16, slide block 16 drives clamp device 17 again, makes that light path device 3 is upper and lower mobile.

Wherein light source 2 is for stable, broad spectrum light source 2, LED lamp that optional light source 2 can be a white and halogen tungsten light source 2 etc., the light that light source 2 sends arrives light-dividing device 7 through the transmission of multimode optical fiber, eyeglass refraction through optic probe 8 makes polychromatic light focus on optic probe 8 below different distance again, form bigger chromatic dispersion defocusing amount, the reflection of polychromatic light process lens 19 to be measured is from newly getting back to light-dividing device 7, the light that enters light-dividing device 7 enters detecting device 4 through multimode optical fiber, generate signal through detecting device 4 and enter client terminal 6, and through the demonstration of the software in the client terminal 6, analyze, computing, obtain the thickness of lens 19 to be measured, light source 2 catoptric imagings and collection of illustrative plates etc., client terminal 6 can be a computer, smart mobile phone etc., before putting into lens 19 to be measured, owing to there is not reflected light, therefore the spectrometer detection only is a background signal, if put within the measurement range of probe with sheet glass, the upper and lower surface of lens just forms reflection to two kinds of different color lights, therefore the luminous energy that reflects back enters light-dividing device 7 fully, other coloured light then forms the disc of confusion greater than light-dividing device 7 at light-dividing device 7 places, antijamming capability is strong, the energy trace of corresponding each coloured light of spectrum, the wavelength correspondence of two peak value place correspondences the thickness of lens 19 to be measured.

Computing formula is derived:

Among Fig. 2, the radius-of-curvature of convex surface is R, and thickness is D, obtains wavelength X through test at spectrum ₁And λ ₂Peak value appears, respectively two bundle autocollimation light, wherein λ in the corresponding diagram ₁Corresponding first autocollimation, λ ₂Through first face refraction back second face realized autocollimation, following derivation is arranged according to formed geometric triangulation relation among refraction law and the figure.

In triangle OAB, utilize the law of sines to have:

$\frac{\mathrm{OB}}{\sin \∠\mathrm{OAB}}=\frac{\mathrm{OA}}{\sin {\mathrm{\θ}}_2}\⇒\∠\mathrm{OAB}=\arcsin \left(\frac{\mathrm{OB}}{\mathrm{OA}}\sin {\mathrm{\θ}}_2\right)=\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\θ}}_2\right)---\left(1\right)$

Wavelength X ₂Incident angle and ∠ OAB complementation, so have:

$a=\mathrm{\π}-\∠\mathrm{OAB}=\mathrm{\π}-\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\θ}}_2\right)---\left(2\right)$

Can release according to simple triangle relation among refraction law and the figure:

${\mathrm{\θ}}_4=a-b=a-\arcsin \frac{\sin a}{n\left({\mathrm{\λ}}_2\right)}---\left(3\right)$

θ ₅=a-θ ₂,θ ₃=θ ₂-θ ₄

In triangle OAB, have

$\mathrm{AB}=\frac{\sin {\mathrm{\θ}}_5\·R}{\sin {\mathrm{\θ}}_2}=\frac{\sin (a-{\mathrm{\θ}}_2)\·R}{\sin {\mathrm{\θ}}_2}---\left(4\right)$

In triangle ABC, utilize the law of sines to have:

$\mathrm{BC}=\frac{\mathrm{AB}\·\sin {\mathrm{\θ}}_4}{\sin {\mathrm{\θ}}_3}---\left(5\right)$

So the thickness of part to be measured is: (the substitution formula 1,2 in the lump, 3,4,5)

${\mathrm{<figure-callout\; id="0"\; label="D"\; filenames="HDA00002799465300021.png"\; state="\{\{state\}\}">D</figure-callout>}}_0+\mathrm{BC}={\mathrm{<figure-callout\; id="0"\; label="D"\; filenames="HDA00002799465300021.png"\; state="\{\{state\}\}">D</figure-callout>}}_0+\frac{\frac{\sin (a-{\mathrm{\&theta;}}_2)\&CenterDot;R}{\sin {\mathrm{\&theta;}}_2}\&times;\sin (a-\arcsin \left(\frac{\sin a}{n\left(\mathrm{\&lambda;}2\right)}\right))}{\sin ({\mathrm{\&theta;}}_2-a+\arcsin \left(\frac{\sin a}{n\left(\mathrm{\&lambda;}2\right)}\right))}$

$={\mathrm{<figure-callout\; id="0"\; label="D"\; filenames="HDA00002799465300021.png"\; state="\{\{state\}\}">D</figure-callout>}}_0+\frac{\frac{\sin [\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2\right)-{\mathrm{\&theta;}}_2]\&CenterDot;R}{\sin {\mathrm{\&theta;}}_2}\&times;\sin \left[\arcsin \right(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2-\arcsin \left(\frac{\sin \left(\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2\right)\right)}{n\left({\mathrm{\&lambda;}}_2\right)}\right)]}{\sin [{\mathrm{\&theta;}}_2-\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2\right)+\arcsin \left(\frac{\sin (\mathrm{\&pi;}-\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2\right))}{n\left({\mathrm{\&lambda;}}_2\right)}\right)]}$

${\mathrm{<figure-callout\; id="0"\; label="D"\; filenames="HDA00002799465300021.png"\; state="\{\{state\}\}">D</figure-callout>}}_0+R\frac{\frac{\sin [\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2\right)-{\mathrm{\&theta;}}_2]}{\sin {\mathrm{\&theta;}}_2}\&times;\sin [\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2\right)-\arcsin \left(\frac{R+D_0}{R\&times;n\left({\mathrm{\&lambda;}}_2\right)}\sin {\mathrm{\&theta;}}_2\right)]}{\sin [{\mathrm{\&theta;}}_2-\arcsin \left(\frac{R+D_0}{R}\sin {\mathrm{\&theta;}}_2\right)+\arcsin (\frac{R+D_0}{R\&times;n\left({\mathrm{\&lambda;}}_2\right)}\sin {\mathrm{\&theta;}}_2]}$

As can be seen, the thickness of part to be measured is relevant with four amounts in the formula, is respectively θ ₂, R and D ₀And optical glass to be measured is in wavelength X ₂The refractive index at place.Wherein, θ ₂And D ₀Relevant with the design of optic probe 8, can be from the curve of spectrum that obtains, the λ at corresponding peak wavelength place ₁And λ ₂Determine; R is the curvature (needing known) of part to be measured; N (λ ₂) can look into existing material depot acquisition.Therefore, can obtain the geometric thickness of part to be measured by above computing, these computings can be equipped with in the analysis software in client terminal 6 and move.

Above-described only is embodiments more of the present utility model.For the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model creation design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims (5)

1. lens center thickness optical detector, it is characterized in that, comprise support, light source, light path device, detecting device, longitudinal moving device, objective table and client terminal, described longitudinal moving device is connected with support, described light path device is connected with longitudinal moving device, described light path device comprises light-dividing device and optic probe, described light-dividing device connects light source and detecting device by optical fiber, described detecting device connects client terminal by data line, in the described client terminal analysis software is installed, described objective table is provided with lens permanent seat, described lens permanent seat be located at light path device under.

2. lens center thickness optical detector according to claim 1 is characterized in that, described optical fiber is Y shape.

3. lens center thickness optical detector according to claim 1, it is characterized in that, described optic probe comprises first eyeglass, second eyeglass, prismatic glasses, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass that is arranged in order from bottom to top, described first eyeglass and prismatic glasses are the arc convex lens, described second eyeglass is concavees lens, described the 4th eyeglass, the 5th eyeglass and the 6th eyeglass are convex lens, and described first eyeglass, second eyeglass, prismatic glasses, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass are optical glass of the same race.

4. lens center thickness optical detector according to claim 3, it is characterized in that, described light path device also comprises stationary magazine creel, described stationary magazine creel is a cylindrical shape, described light-dividing device is located at stationary magazine creel upper end circle centre position, described optic probe is located at the bottom of stationary magazine creel, the central lines of the center line of described optic probe and first eyeglass, second eyeglass, prismatic glasses, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass.

5. lens center thickness optical detector according to claim 1, it is characterized in that, described longitudinal moving device comprises the rotation axis that vertical ground and two ends and support are rotationally connected, the gear of fixedly connected rotation axis and with the adjusting gear of gearing mesh, described rotation axis outside is provided with screw thread, the described rotation axis outside also is arranged with axle sleeve, be provided with screw thread in the described axle sleeve with the engagement of rotation axis external screw-thread, described axle sleeve is fixedly connected with catch bar, described catch bar is connected with slide block, described slide block is fixedly connected with clamp device, the fixedly connected light path device of described clamp device.

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