Abstract: A lens module includes a first lens and a second lens. The first lens includes a first central round portion and a first peripheral portion. The first peripheral portion has a first radially extending portion surrounding the first central round portion, and a first axially extending portion extending from the first radially extending portion. The first radially extending portion has a plurality of through holes defined therein. The second lens includes a second central round portion and a second peripheral having a second radially extending portion surrounding the second central round portion, and a second axially extending portion extending from the second radially extending portion. The second axially extending portion fittingly engaged in the first axially extending portion. The second axially extending portion and the first lens cooperatively define an inner space. The through holes are in communication with the inner space.

Abstract: A fixture for grinding machines includes a first base (10), a second base (20) and a driving component (40). The first base defines a first working groove (11) therein. The second base defines a second working groove (21) corresponding to the first working groove therein. The driving component is configured for sliding in the first working groove to remove workpieces from the first base, and sliding in the second working groove to cooperate with the second base to hold workpieces in the second working groove.

Abstract: A detecting apparatus includes a light source configured (i.e., structured and arranged) for irradiating the lens module with light, the light being brought into a focus by the lens module; a detecting device configured for measuring and recording a location of the focus; and a driving device configured for driving a barrel of the lens module to rotate relative to a holder of the lens module. The detecting apparatus is particularly configured such that, when the driving device drives the barrel of the lens module to rotate to two different angular locations, the light source irradiates the lens module with light, the lens module making the light be brought into two respective focuses at (i.e., relative to) the two different angular locations, and the detecting device measures a deviation distance between the two respective focuses. A method of detecting concentricity of a lens module is further provided.

Abstract: An exemplary apparatus for checking concentricity between a holder and a lens barrel of a lens module includes a light source, a gauge, and a detecting and analyzing device. The gauge includes an inner barrel and an outer barrel. The inner barrel is capable of rotating to a predetermined angle relative to the outer barrel. The inner barrel is configured for coupling with the lens barrel of the lens module. In addition, a method for checking the concentricity is also provided.

Abstract: A detecting apparatus includes a light source configured (i.e., structured and arranged) for irradiating the lens module with light, the light being brought into a focus by the lens module; a detecting device configured for measuring and recording a location of the focus; and a driving device configured for driving a barrel of the lens module to rotate relative to a holder of the lens module. The detecting apparatus is particularly configured such that, when the driving device drives the barrel of the lens module to rotate to two different angular locations, the light source irradiates the lens module with light, the lens module making the light be brought into two respective focuses at (i.e., relative to) the two different angular locations, and the detecting device measures a deviation distance between the two respective focuses. A method of detecting concentricity of a lens module is further provided.

Abstract: An apparatus for checking concentricity between a barrel holder and a lens barrel rotatably engaging with the barrel holder is provided. The lens barrel includes at least one lens coaxially received therein. The apparatus includes a barrel holder retaining member, a rotating member, a driving unit, a light source, and an image sensor. The barrel holder retaining member is used for fixedly retaining the barrel holder in position. The rotating member is structured for meshing with the lens barrel. The driving unit is used for driving the rotating member to rotate, thereby rotates the lens barrel. The light source is configured for emitting light toward a first end of the lens barrel. The image sensor is arranged to face toward an opposite second end of the lens barrel. The image sensor is configured for sensing the light emitted from the light source.

Abstract: A fixture for grinding machines includes a first base (10), a second base (20) and a driving component (40). The first base defines a first working groove (11) therein. The second base defines a second working groove (12) corresponding to the first working groove therein. The driving component is able to slide in the first working groove, and the driving component cooperates with the first base and the second base to releasably hold workpieces.

Abstract: A fixture for grinding machines includes a first base (10), a second base (20) and a driving component (40). The first base defines a first working groove (11) therein. The second base defines a second working groove (21) corresponding to the first working groove therein. The driving component is configured for sliding in the first working groove to remove workpieces from the first base, and sliding in the second working groove to cooperate with the second base to hold workpieces in the second working groove.

Abstract: An exemplary mold for molding lenses includes an upper mold core, a lower mold core, and a shell. The upper mold core has a first convex molding surface. The lower mold core has a second convex molding surface opposite to the first convex molding surface. The shell has an upper portion and a lower portion for respectively accommodating the upper mold core and the lower mold core therein. The shell has an inner step support formed between the upper portion and the lower portion.

Abstract: An apparatus for cylindrically grinding workpieces includes a first holding tool (100) for positioning pre-grinding workpieces (40) and a second holding tool (200) for positioning partially ground workpieces (i.e. workpieces which have been ground on one side only). The first holding tool (100) defines a first groove (226) for containing the pre-grinding workpieces to be partially ground and the second bonding defines a second groove (322) for containing the partially ground workpieces. At least one first resisting member (26) and at least one first back plate (24) detachably connect with the at least one first holding member (22), and thus making up the first holing tool (100). At least one second resisting member (36) and a at least one second back plate (34) detachably connect at least one second holding member (36), and thus making up the second holding tool (100). The present invention also provides a process for cylindrically grinding workpieces.

Abstract: The grinding apparatus (10) includes a base (100) for receiving at least one workpiece, a pressing portion (106), and a blocking portion (102) opposite to the pressing portion. The pressing portion is movable relative to the blocking portion. The pressing portion is configured for applying a pressing force against the workpiece, so as to hold the workpiece between the pressing portion and the blocking portion.

Abstract: An apparatus for cylindrically grinding workpieces includes a first holding tool (10), a second holding tool (12), and a grinding wheel (14). The first holding tool is configured for positioning un-ground workpieces (18), and the first holding tool defines a plurality of first grooves (104) for containing the un-ground workpieces to be partially ground. The second holding tool is configured for positioning the partially ground workpieces, and the second holding tool defines a plurality of second groove (124) for containing the partially ground workpieces. The grinding wheel defines a plurality of grinding grooves (142) for grinding the workpieces.

Abstract: An apparatus for cylindrically grinding workpieces includes a first holding tool (10) and a second holding tool (12). The first holding tool is configured for positioning pre-grinding workpieces (18). The first holding tool defines a first groove (103) for containing the pre-grinding workpieces. A first stopping board (106) is detachably connected to one side of the first holding tool, and a first pressing mechanism (107) is elastically connected to another side. The first pressing mechanism and the first stopping board cooperatively press the pre-grinding workpieces into the first groove. The second holding tool (12) is configured for positioning the partially ground workpieces. The second holding tool defines a second groove (123) for containing the partially ground workpieces. A second stopping board (126) is connected to one side of the second holding tool, and a second pressing mechanism (127) is elastically connected to another side.

Abstract: An exemplary apparatus for cylindrically grinding workpieces (60) includes a first holding tool (20), a second holding tool (30), and a first grinding wheel (10). The first holding tool is configured for positioning pre-grinding workpieces, and the first holding tool defines a first groove (24) for containing the pre-grinding workpieces to be partially ground. The second holding tool is configured for positioning the partially ground workpieces, and the second holding tool defines a second groove (34) for containing the partially ground workpieces. The first grinding wheel is configured for grinding the pre-grinding workpieces in the first holding tool. The first grinding wheel defines a first grinding groove (104), and the first grinding groove is defined by a semicircular bottom wall (1042) and two slanted walls (1044) connected with the semicircular bottom wall.

Abstract: An apparatus for cylindrically grinding workpieces includes a first holding tool (100) for positioning pre-grinding workpieces (40) and a second holding tool (200) for positioning partially ground workpieces (i.e. workpieces which have been ground on one side only). The first holding tool (100) defines a first groove (226) for containing the pre-grinding workpieces to be partially ground and the second bonding defines a second groove (322) for containing the partially ground workpieces. At least one first resisting member (26) and at least one first back plate (24) detachably connect with the at least one first holding member (22), and thus making up the first holing tool (100). At least one second resisting member (36) and a at least one second back plate (34) detachably connect at least one second holding member (36), and thus making up the second holding tool (100). The present invention also provides a process for cylindrically grinding workpieces.

Abstract: A fixture for grinding machines includes a first base (10), a second base (20) and a driving component (40). The first base defines a first working groove (11) therein. The second base defines a second working groove (12) corresponding to the first working groove therein. The driving component is able to slide in the first working groove, and the driving component cooperates with the first base and the second base to releasably hold workpieces.

Abstract: An apparatus for cylindrically grinding workpieces includes a first holding tool (10) and a second holding tool (12). The first holding tool is configured for positioning pre-grinding workpieces (18). The first holding tool defines a first groove (103) for containing the pre-grinding workpieces. A first stopping board (106) is detachably connected to one side of the first holding tool, and a first pressing mechanism (107) is elastically connected to another side. The first pressing mechanism and the first stopping board cooperatively press the pre-grinding workpieces into the first groove. The second holding tool (12) is configured for positioning the partially ground workpieces. The second holding tool defines a second groove (123) for containing the partially ground workpieces. A second stopping board (126) is connected to one side of the second holding tool, and a second pressing mechanism (127) is elastically connected to another side.

Abstract: An exemplary mold for molding lenses includes an upper mold core, a lower mold core, and a shell. The upper mold core has a first convex molding surface. The lower mold core has a second convex molding surface opposite to the first convex molding surface. The shell has an upper portion and a lower portion for respectively accommodating the upper mold core and the lower mold core therein. The shell has an inner step support formed between the upper portion and the lower portion.

Abstract: An apparatus for cylindrically grinding workpieces includes a first holding tool (10), a second holding tool (12), and a grinding wheel (14). The first holding tool is configured for positioning un-ground workpieces (18), and the first holding tool defines a plurality of first grooves (104) for containing the un-ground workpieces to be partially ground. The second holding tool is configured for positioning the partially ground workpieces, and the second holding tool defines a plurality of second groove (124) for containing the partially ground workpieces. The grinding wheel defines a plurality of grinding grooves (142) for grinding the workpieces.

Abstract: A fixture (10) for bonding workpieces (14) includes a frame (12) and a supporting board (13). The frame includes a first side wall (121), a second side wall (122), and a third side wall (123). The first side wall is opposite to the second side wall, and the third side wall connects the first side wall and the second side wall. The supporting board is slideably associated with the first side wall and the second side wall. The first side wall and the second side wall respectively have a slideway (124) associated with the supporting board. The slideways of the first side wall and the second side wall are opposite to each other.