CN101269473B - Method for circular spherical optics lens centering - Google Patents

Abstract

The invention relates to a centering method of a circular spherical optical lens, which is characterized in that the method comprises the steps that: a. one face with large radius of curvature of thespherical optical lens is milled, and the milling amount is 50 to 70 microns; b. the size of a milling cramping apparatus is modified, so as to ensure that the spherical lens is just put in the milling cramping apparatus and tightly attaches to the milling cramping apparatus; c. one face with small radius of curvature of the spherical optical lens is milled, when the face is milled, the thicknessof the peripheral edge is also measured till the thickness difference of the peripheral edge of the spherical optical lens is within 2microns. The centering method can be widely processed, is suitable for centering the spherical lens with the diameter between Phi 3 to Phi 130 mm, almost has no requirement on the spheric radius of parts, has little dependence on the experience of operators duringprocessing, has little requirement on the clean degree of equipment, can be processed in large batch, and has high processing efficiency and low loss rate.

Description

Be used for the method that circular spherical optics lens centers

Technical field

The present invention relates to a kind of method that circular spherical optics lens centers that is used for.

Background technology

Usually adopt Mechanical Method centering edging to guarantee the center requirement of optical lens in the optics industry, but this method at first must satisfy the centering condition:

$\left|\frac{\frac{D1}{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="H2008100606961E00011.png,H2008100606961E00012.png"\; state="\{\{state\}\}">r</figure-callout>}1}\&PlusMinus;\frac{D2}{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="H2008100606961E00011.png,H2008100606961E00012.png"\; state="\{\{state\}\}">r</figure-callout>}2}}{4}\right|=K$

In the formula

D1, D2 are respectively two diameters of edging chuck;

R1, r2 are respectively the sphere curvature radius of the edging chuck of correspondence;

K is the centering coefficient.

Biconvex, biconcave lens are got "+" number, and meniscus lens is got "-" number, and when centering COEFFICIENT K＞0.15, it is feasible to feel relieved; 0.15＞K＞0.1 o'clock, it is feasible to feel relieved, but precision is relatively poor; And when K＜0.1, centering is difficult to realize.Obviously, under the condition of same diameter, lens radius of curvature is more little, and centering precision is high more.Generally speaking, common spotting device is applicable to radius of curvature not too big (R＜180mm) and diameter is at the lenses centering of 6～70mm.Centering precision is generally 0.01mm.The scope of application has limitation.With Mechanical Method centering edging the cleaning of equipment is had relatively high expectations in addition, the precision of centering also depends on the precision of edging chuck and operative employee's operative skill to a great extent.

Summary of the invention

Technical problem to be solved by this invention be overcome the deficiencies in the prior art and provide a kind of applied widely, easy to operate, working (machining) efficiency is high, the proportion of goods damageds are low is used for the method that circular spherical optics lens centers.

The technical scheme that the present invention solves the problems of the technologies described above employing is, this is used for the method that circular spherical optics lens centers, and its characteristics are may further comprise the steps: a, the big one side of milling spherical optical lens mean curvature radius, stock removal 0.5-0.7mm; B, correction milling anchor clamps size, these milling anchor clamps are used for the little one side of milling spherical optical lens mean curvature radius, generally adopt the milling anchor clamps of aluminium matter, make spherical lens just be placed in these milling anchor clamps, and both are close to; C, the little one side of milling spherical optical lens mean curvature radius, measure the thickness of woollen its circumferential edges of lens after the milling, require spherical optical lens circumferential edges thickness difference within the 0.02mm scope, undesirable repeating step b, c until spherical optical lens circumferential edges thickness difference within the 0.02mm scope.

The present invention compared with prior art has the following advantages: machinable scope is wide, be applicable to the spherical lens centering of diameter at Φ 3～Φ 130mm, spherical radius to part does not almost have any requirement, the less dependence of process operator's experience, clean level to equipment is less demanding, can process in enormous quantities, the working (machining) efficiency height, the proportion of goods damageds are low.

Figure of description

Fig. 1 is the embodiment of the invention 1 step 1 schematic diagram.

Fig. 2 be among Fig. 1 A to schematic diagram.

Fig. 3 is the embodiment of the invention 1 step 2 schematic diagram.

Fig. 4 is the embodiment of the invention 1 step 3 schematic diagram.

Fig. 5 is the embodiment of the invention 1 step 4 schematic diagram.

The specific embodiment

This is used for the method that circular spherical optics lens centers, and its characteristics are may further comprise the steps: a, the big one side of milling spherical optical lens mean curvature radius, stock removal 0.5-0.7mm; B, correction milling anchor clamps size, these milling anchor clamps are used for the little one side of milling spherical optical lens mean curvature radius, generally adopt the milling anchor clamps of aluminium matter, make spherical lens just be placed in these milling anchor clamps, and both are close to; C, the little one side of milling spherical optical lens mean curvature radius, measure the thickness of woollen its circumferential edges of lens after the milling, require spherical optical lens circumferential edges thickness difference within the 0.02mm scope, undesirable repeating step b, c until spherical optical lens circumferential edges thickness difference within the 0.02mm scope.

Embodiment 1

Below to diameter of phi 62mm, radius R 1=441mm, the optical lens product of R2=243mm is processed and is further specified:

1, earlier the nylon milling anchor clamps 1 of external processing is loaded on the CG-2.0 type spherical surface miling-grinding machine, the glass lens putting hole diameter of these anchor clamps is Φ 62.2mm, after putting into, tightens up glass lens woolen cloth 2 expansion joint 3 of nylon milling anchor clamps 1, to clamp glass lens woolen cloth 2 (as Fig. 1, Fig. 2), on the bistrique axle, load onto Φ 43mm150# diamond milling emery wheel again, after adjusting the bistrique angle, process, mill about 30 seconds, stock removal 0.5-0.7mm, the sphere that can process R1=441mm comes, and the sphere that processes should not have the dead point, no chrysanthemum line.

2, the aluminium matter milling anchor clamps 4 of external processing are loaded on the other CG-2.0 type spherical surface miling-grinding machine, the glass lens putting hole 6 of these anchor clamps is designed to Φ 61.5mm, also must revise the putting hole position on milling and grinding machine again.With reference to Fig. 3, on milling and grinding machine bistrique axle, load onto the milling cutter 5 of a Φ 5mm, shake handle, adjust the bistrique angle, make the bistrique axis parallel with axis of workpiece, start lathe again, the vertical handwheel and the horizontal handwheel that rotate on the milling and grinding machine come the trimming hole position, make the diameter in hole can just put into the glass lens woolen cloth of Φ 62mm, this just tentatively revises the milling anchor clamps.

3, the glass spherical lens woolen cloth that processes one side is put into the putting hole of aluminium matter milling anchor clamps 4 inwardly, make when putting into and milled good sphere 8 and contact with step 7 steadily, tighten up clamp glass lens woolen cloth 2 (as Fig. 4) simultaneously, similar with step 1 then, mill out the sphere of R2=243mm, and guarantee the center thickness that part processing requires.

4, with reference to Fig. 5, the glass lens woolen cloth 2 of milling completion is placed in the measurement bearing 9, carry out the thick measurement in limit with amesdial 10, gently rotate glass lens woolen cloth 2 with have gentle hands during measurement, note observing the variation of amesdial reading, the thick difference in limit that should guarantee glass lens woolen cloth 2 is in the 0.02mm scope, as not in the 0.02mm scope, also must place the position to the part of aluminium matter milling anchor clamps slightly revises, general repetition can be controlled at the thick difference in limit in the 0.02mm scope for 2～3 times, thereby has guaranteed the requirement of circular spherical optics lens center by the method for the thick difference in milling control limit.

So just finish the preceding preparation of milling, can produce operation in batches.

Claims (1)

1. one kind is used for the method that circular spherical optics lens centers, and it is characterized in that may further comprise the steps: a, the big one side of milling spherical optical lens mean curvature radius, stock removal 0.5-0.7mm; B, with milling cutter correction milling anchor clamps size, these milling anchor clamps are used for the little one side of milling spherical optical lens mean curvature radius, adopt the milling anchor clamps of aluminium matter, make spherical lens just be placed in these milling anchor clamps, both are close to; C, the little one side of milling spherical optical lens mean curvature radius, measure the thickness of woollen its circumferential edges of lens after the milling, require spherical optical lens circumferential edges thickness difference within the 0.02mm scope, undesirable repeating step b, c until spherical optical lens circumferential edges thickness difference within the 0.02mm scope.

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