Telecentric illumination system
Patent 4526443 Issued on July 2, 1985. Estimated Expiration Date: 
September 14, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 14, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2078586 2552238 3421808 Telecentric illumination system Patent #: 4386828 InventorAssigneeApplicationNo. 06/418031 filed on 09/14/1982US Classes:359/663, Telecentric system359/683, With mechanical compensation362/335Curved lens typeExaminersPrimary: Corbin, John K.Assistant: Gass, Rebecca D. Attorney, Agent or FirmInternational ClassesG02B 13/22 (20060101)G02B 15/16 (20060101) G02B 21/08 (20060101) G02B 21/06 (20060101) Foreign Application Priority Data1981-11-04 JPAbstractA telecentric illumination system for telecentrically illuminating an object includes a light source, optical means for telecentrically supplying a light beam from the light source to the object, and an auxiliary condenser removably disposed between the optical means and the object to be illuminated. The auxiliary condenser has a first and a second lens group disposed with a spacing therebetween corresponding to the sum of the focal lengths thereof. Thus, when the auxiliary condenser is inserted between the optical means and the object to be illuminated, there is achieved a telecentric illumination of higher magnification than the illuminated condition by the optical means. | |
