Needle Points And Spread Functions

S. E. Barryte; H. L. Kasdan; P. S. Toorvald

doi:10.1117/12.955899

21 November 1977 Needle Points And Spread Functions

S. E. Barryte, H. L. Kasdan, P. S. Toorvald

Proceedings Volume 0126, Clever Optics: Innovative Applications of Optics; (1977) https://doi.org/10.1117/12.955899
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

Abstract

Inspecting hypodermic syringe needle points has, until recently, been an error prone, time consuming visual process. At a rate of several per second, the human inspector employing a single lens magnifier can easily miss marginal defects or even major defects if a blink occurs at the wrong time. A system that analyses diffraction from the needle tip using a solid state phOtodetector array has been developed. This system inspects up to twelve (12) needles per second with lower error rates than the human inspe ctor. In this paper, we discuss the major elements of the Needle Point Inspection Device. The optical configuration as well as materials handling and control software are described to illustrate the problems involved in bring-ing coherent electro-optical technology into the factory.

Citation Download Citation

S. E. Barryte, H. L. Kasdan, and P. S. Toorvald "Needle Points And Spread Functions", Proc. SPIE 0126, Clever Optics: Innovative Applications of Optics, (21 November 1977); https://doi.org/10.1117/12.955899

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