TWI409431B - Device for measuring centering error and instrument including same - Google Patents

Abstract

The present invention relates to a device for measuring centering error. The device is used to measure an optical component. The device includes a platform, at least two supporting components, and at least two clamping components for clamping the optical component. The supporting component and the clamping component are movably disposed on the platform. The device also includes a tray for supporting the optical component. The tray supports on the at least two supporting components. The tray defines a through hole therein. The through hole allows an optical portion of the optical component to be measured. The optical portion of the optical component is used for imaging. The present invention also relates to an instrument including the device.

Description

Eccentric measuring device and measuring instrument

The present invention relates to an eccentric measuring device and a measuring instrument including the eccentric measuring device, and more particularly to an eccentric measuring device for measuring the eccentricity of a lens and a measuring instrument including the eccentric measuring device.

In recent years, with the development of multimedia technology, the application range of lens modules has become wider and wider, such as in electronic products such as digital cameras, video cameras, and mobile phones with camera functions. People are pursuing miniaturization of digital cameras, camcorders, and mobile phones with camera functions. At the same time, they have put forward higher requirements on the image quality of the objects they shoot, that is, they want the image of the object to be clear, and the lens module The quality of the image depends to a large extent on the quality of the optical components in the lens module.

The lens module usually includes components such as a lens, an optical filter, and an image sensor, wherein the lens is sequentially fixed in the lens barrel along the central axis direction of the lens barrel. Before the lens is placed in the lens barrel, its eccentricity needs to be measured to ensure the accuracy of the lens and the imaging quality of the lens module. The lens includes a mounting portion for mounting and an optical portion for light transmissive imaging, typically measuring the optical portion of the lens to calculate the eccentricity of the lens. Tomas Fischer et al. 2006 IEEE Symposium on Systems, Instruments and Measurement Technologies (Instrumentation and A method for measuring optical elements such as lenses is disclosed in A Novel Optical Method of Dimension Measurement of Obiects with Circular Cross-section.

In the prior art, a measuring instrument is usually used to measure the eccentricity of the lens. The measuring instrument comprises a measuring instrument and an eccentric measuring device. The eccentric measuring device comprises a plurality of bearing elements for carrying the lens and a plurality of holding elements for holding the lens, and the eccentric measuring device is provided with a plurality of sliding grooves, according to the diameter of the measured lens, the bearing element slides in the sliding slot and Cooperating with the holding element to fix the measured lens to the eccentric measuring device to measure the eccentricity of the lens.

However, when the diameter of the measured lens is small or the width of the mounting portion is small, it is difficult for the manual working bearing member to slide in the sliding groove to accurately position the bearing member to carry the lens. If the sliding amount of the bearing member in the sliding slot is too large, the bearing member blocks the optical portion of the lens, which makes it difficult to accurately measure the eccentricity of the lens; if the sliding amount of the bearing member in the sliding slot is too small, the bearing member is difficult to carry the lens. This makes it difficult to measure the eccentricity of the lens. Both of the above cases make it difficult to accurately measure the eccentricity of the lens, so it is difficult to ensure the accuracy of the lens and the imaging quality of the lens module.

In view of the above, it is necessary to provide an eccentricity measuring device capable of accurately measuring the eccentricity of a lens and a measuring instrument including the eccentric measuring device.

An eccentric measuring device for measuring an eccentricity of an optical component, the eccentric measuring device comprising: a base, at least two bearing members, and at least two Holding the holding member of the optical component, the bearing member and the holding member are movably disposed on the base, wherein the eccentric measuring device further comprises a carrier for carrying the optical component, the carrier bears On the at least two bearing members, the carrier is provided with a through hole that allows measurement of the optical portion of the optical component for light transmission imaging.

A measuring instrument for measuring an eccentricity of an optical component, the measuring instrument comprising: a measuring instrument, and an eccentric measuring device, the measuring instrument comprising a platform, the eccentric measuring device being disposed on the platform, the eccentric measuring device comprising a base plate, at least two bearing elements, and at least two holding elements for holding the optical element, the bearing element and the holding element being movably disposed on the base, wherein the eccentric measuring device further comprises a carrier for carrying the optical component, the carrier bears against the at least two bearing elements, the carrier is provided with a through hole, which allows optical for optical imaging of the optical component The Ministry conducts measurements.

Compared with the prior art, since the eccentric measuring device and the measuring instrument include a carrier for carrying the lens to be measured, when the diameter of the measured lens is small or the width of the mounting portion is small, only the manual operation is required. The component is slid in the sliding slot to position the bearing member to carry the carrier, and the lens is placed on the carrier, thereby accurately measuring the eccentricity of the lens to ensure the precision of the lens and the lens mode. The imaging quality of the group.

10‧‧‧Measurement instruments

100‧‧‧Eccentric measuring device

101‧‧‧ lens

1011‧‧‧Optical Department

1012‧‧‧Installation Department

1013‧‧‧ upper surface

1014‧‧‧ lower surface

110‧‧‧Abutment

120‧‧‧Relying components

122‧‧‧Responsible Department

130‧‧‧ Holding components

131‧‧‧Installation Department

132‧‧‧claw

140,340,440‧‧‧Package

141,341,441‧‧‧through holes

142,442‧‧‧Loading Department

150‧‧‧Adjustment components

160‧‧‧ reference components

200‧‧‧meter

210‧‧‧ platform

220‧‧‧ probe

343‧‧‧ 容部

4411‧‧‧ inner wall

443‧‧‧ Groove

1 is a perspective view of a measuring instrument provided by an embodiment of the present invention.

2 is a perspective view of an eccentric measuring device of the measuring instrument shown in FIG. 1.

Figure 3 is a cross-sectional view taken along line III-III of Figure 2.

Figure 4 is an enlarged view of a portion IV of Figure 3.

Figure 5 is a cross-sectional view showing a second carrier of the eccentricity measuring device according to the embodiment of the present invention.

6 is a top plan view of a third carrier of the eccentricity measuring device provided by the embodiment of the present invention.

The invention will now be further described in detail in conjunction with the drawings.

Please refer to FIG. 1. FIG. 1 is a measuring instrument 10 for measuring the eccentricity of a lens 101 (shown in FIG. 4) according to an embodiment of the present invention. The measuring instrument 10 includes: a measuring instrument 200 and an eccentricity measurement. Device 100.

The meter 200 includes a platform 210, a probe 220, and a processor (not shown). The eccentricity measuring device 100 is disposed on the platform 210. The probe 220 is electrically coupled to the processor. The probe 220 is configured to measure the parameters of the lens 101, and convert the measured parameter information into a digital signal to the processor, and the processor receives the digital signal and calculates a result.

Referring to FIGS. 2 to 4, the eccentric measuring device 100 includes a base 110, three bearing members 120, three holding members 130 for holding the lens 101, and a carrier for carrying the lens 101. 140.

The eccentricity measuring device 100 further includes three adjusting components 150 disposed on the base 110 and three reference components 160 fixed to the base 110. The The adjustment component 150 is used to adjust the height and inclination of the eccentricity measuring device 100 on the platform 210 of the meter 200. The probe 220 measures the parameters of the reference surface of the reference component 160 and the parameters of the upper surface 1013 and the lower surface 1014 of the lens 101, and converts the parameter information into a digital signal, and the processor transmits the reference to the processor. The parameter information of the surface is compared with the parameter information of the upper surface 1013 and the parameter information of the lower surface 1014, thereby calculating the eccentricity of the lens 101.

The bearing element 120 is provided with a bearing portion 122. The bearing portion 122 is for supporting the carrier plate 140.

The holding component 130 is provided with a mounting portion 131 and a clamping jaw 132. The jaw 132 is fixed to the mounting portion 131 by a bolt for holding the lens 101.

The carrier 140 is provided with a through hole 141 and a carrying portion 142 for carrying the lens 101. The bearing portion 142 is carried by the bearing portion 122 of the bearing member 120. The through hole 141 allows the probe 220 to pass through the measurement of the optical portion 1011 for the light transmission imaging of the lens 101. To achieve accurate measurement of the eccentricity of the lens 101, the width W1 of the through hole 141 is greater than the width W2 of the optical portion 1011 of the lens 101. Correspondingly, the width W1 of the through hole 141 should be smaller than the width W3 of the lens 101 to enable the carrying portion 142 to carry the lens 101 to prevent the lens 101 from falling from the through hole 141.

The carrier can also be a carrier of other configurations, and FIG. 5 shows a second carrier 340. The carrier 340 is provided with a receiving portion 343 for receiving the lens 101. The housing The center of the 343 is aligned with the center of the through hole 341 and the width W4 of the receiving portion 343 is equal to the width W3 of the lens 101 to ensure that the center of the lens 101 is aligned with the center of the through hole 341, thereby realizing the lens 101. The omnidirectional measurement of the optical portion 1011.

FIG. 6 shows a third carrier 440. The inner wall 4411 of the through hole 441 of the loading plate 440 extends in the radial direction thereof with four grooves 443 which are equally spaced in the circumferential direction, and the four grooves 443 extend through the carrier plate. 440. When the lens 101 is placed on the carrier 440 for measurement, the center of the lens 101 is not aligned with the center of the through hole 441 due to human factors, etc., so that the optical portion 1011 of the lens 101 is carried by the carrier of the carrier 440. When the 442 is blocked, the optical portion 1011 of the lens 101 can be measured by the four grooves 443, thereby accurately measuring the eccentricity of the lens 101. Preferably, the width W5 between the sidewalls of each of the four opposite grooves 443 is greater than the width W3 of the lens 101 to achieve an omnidirectional measurement of the lens 101.

Since the eccentric measuring device 100 and the measuring instrument 10 comprise a carrier for carrying the lens 101 to be measured. When the measured diameter of the lens 101 is small or the width of the mounting portion 1012 is small, it is only necessary to manually operate the bearing member 120 to slide in the sliding slot to position the bearing member 120 to carry the carrier, and then carry the carrier. The lens 101 is placed on the carrier to accurately measure the eccentricity of the lens 101 to ensure the accuracy of the lens 101 and the imaging quality of the lens module.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Anyone who is familiar with the skills of this case Equivalent modifications or variations made in accordance with the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Eccentric measuring device

110‧‧‧Abutment

120‧‧‧Relying components

130‧‧‧ Holding components

131‧‧‧Installation Department

132‧‧‧claw

140‧‧‧carrier

150‧‧‧Adjustment components

160‧‧‧ reference components

Claims (10)

An eccentricity measuring device for measuring an eccentricity of an optical component, the eccentricity measuring device comprising: a base, at least two bearing elements, and at least two holding elements for holding the optical element, the bearing element and The clamping element is movably disposed on the base, the improvement being that the eccentric measuring device further comprises a carrier for carrying the optical component, the carrier bearing against the at least two bearing elements, the carrier The disk is provided with a through hole whose inner wall extends in the radial direction thereof with four grooves, the through hole and the groove permitting measurement of the optical portion of the optical element for light transmission imaging. The eccentricity measuring device according to claim 1, wherein the through hole has a width larger than a width of the optical portion of the optical element and smaller than a width of the optical element. The eccentricity measuring device according to claim 1, wherein the four grooves are arranged at equal intervals in the circumferential direction. The eccentricity measuring device according to claim 3, wherein a width between sidewalls of each of the four opposite grooves is larger than a width of the optical element. The eccentricity measuring device according to claim 1, wherein the carrier is provided with a receiving portion for accommodating the optical component. The eccentricity measuring device according to claim 5, wherein a center of the receiving portion is aligned with a center of the through hole, and a width of the receiving portion is equal to a width of the optical element. A measuring instrument for measuring an eccentricity of an optical component, the measuring instrument comprising: a measuring instrument, and an eccentric measuring device, the measuring instrument comprising a platform, the eccentric measuring device being disposed on the platform, the eccentric measuring device comprising a base plate, at least two bearing elements, and at least two holding elements for holding the optical element, the bearing element and the holding element being movably disposed on the base, wherein the eccentric measuring device further comprises a carrier for carrying the optical component, the carrier bears against the at least two bearing members, the carrier is provided with a through hole, and the inner wall of the through hole extends four concaves in a radial direction thereof The slot, the via and the recess allow measurement of the optic for optical imaging of the optical component. The measuring instrument of claim 7, wherein the width of the through hole is greater than a width of the optical portion of the optical element and smaller than a width of the optical element. The measuring instrument of claim 7, wherein the four grooves are arranged at equal intervals in the circumferential direction. The measuring instrument of claim 7, wherein the carrier is provided with a receiving portion for receiving the optical component.