Emage Vision Pte. Ltd.

Bee Chuan Tan

Sergey Smorgon

Ya'akob Bin Mohamed

Chern Fei Chua

Lew Siang Charles Cher

A manual inspection system and method to inspect for defects in Contact lenses comprising; an image acquisition system with at least two high resolution cameras; Top illumination light head used for acquiring Bright field images; a Backlit illumination module to acquire Dark field images; at least another back lit illumination module to acquire a different type of Bright field images; an interchangeable mechanism to change measurement gauges suitable for a particular product; a rotating wheel embedded with multiple optical filters to cater to different imaging requirements; a first camera to capture the full view of the contact lens at a beam splitter; a second camera suitably mounted on a swivel arm to capture a higher resolution image of a selected defective area as viewed on a projection screen; a glass template or measurement gauge mounted at a suitable position to achieve overlaid images of the lens and the gauge on a projection screen for taking measurements; a flexible template measurement gauge as an optional overlay, to replace the glass template, suitably mounted on the projection screen for easy measurement of defects and geometry of the contact lens; an XYZ table to position the contact lens; creating a database on the computer that tabulates geometrical information and detailed defect information along with their respective positional information; and subsequently analyzing the database images to arrive at corrective actions to the manufacturing process to improve the quality and yields in the contact lens.

Contact lens defect analysis and tracing system

A system for detecting defects in a contact lens material comprising: a camera having a lens and a digital image output for inspecting said lens suspended in saline solution, wherein said camera's digital image output includes only the image produced by light in a color spectrum corresponding to a portion of the spectrum of light produced by fluorescent emission of said lens material; a first Ultra violet light source to illuminate said lens and excite fluorescent emission therein; a first filter to filter the emitted light from the lens which is illuminated by Ultra violet light; and a computer having an associated memory, an input for accepting the digital image output from said camera, and an output representative of an analyzed digital image wherein said analyzed digital image includes visible indications of any imperfections detected in said lens material.

Contact lens defect inspection using UV illumination

An inspection system and method to detect the presence or absence of ophthalmic lenses in a plastic shell just before the seal is applied comprising a high resolution imaging device suitably integrated with an optical module; a UV illumination module suitably mounted below the ophthalmic lens holder; a Visible LED based Top lighting module suitably mounted on Top of the Ophthalmic lens holder; the inspection system which captures images of the lens immersed in a saline solution in a the plastic shell; analyzing the image and determining the characteristics of the lens perimeter and the optical center; making a decision to reject the inspected item if the analyzed image indicates the presence of a flipped, multiple and folded lens or the absence of the lens; making a decision to accept the inspected item, if the analyzed image indicates the presence of a single lens positioned in the correct orientation.

Contact lens inspection in a plastic shell

A system for inspecting an ophthalmic lens comprising an optical connection: an illumination source, wherein the light source is arranged to project the light to wards the ophthalmic lens held in the holder; an optical lens, wherein the lens is arranged to condition and project the light beam to illuminate the lens; a swivel glass plate, which is arranged to move in and out of the optical axis; a bright field imaging unit, wherein the bright field imaging unit is arranged to capture an image projected by the illumination source; a dark field imaging unit, wherein the dark field imaging unit is arranged to capture an image projected by the illumination source; and at least one camera sensor operatively coupled with the swivel glass plate, wherein the at least one camera sensor is arranged to capture an image of the light penetrating through the optical lenscontained at the bottom of the containerand the optical modulepositioned in line with the optical axis

System and method for inspecting opthalmic lenses

An inspection system to inspect the consistency and thermal seal quality of blister packages, the system comprising an illumination module and a color imaging device suitably integrated with an optical module. The blister packages that are thermally sealed are sequentially presented to the color imaging device within its Field of View whereupon the inspection captures multiple images of the illuminated top side of the sealed blister package using the said image pickup devise. The images then undergo analysis to determine the gray scale values of the sealing area. By comparing the gray level values with predetermined gray level values that are programmed at setup, a decision is made to reject the inspected item if the analyzed gray level values is not substantially the same as the predetermined gray level values, or to accept the inspected item if the analyzed gray level values is substantially the same as the predetermined gray level values or rejecting the blister if determined otherwise.

Growing community of inventors

Singapore, Singapore

Bee Chuan Tan