The March Edition of the
OSSC Images Newsletter is now Available!
Optical Engineering & Optical Instrument Design
Spring 2018 courses begin April 2:
15% discount for OSSC Members on courses
Required for a Certificate.
(Discount does NOT apply to the above two
Electives and Prerequisite Courses.)
Laser and Photonics Technology instructors lead hands-on, laboratory-driven classes, utilizing state-of-the-art industrial equipment, based on the industry-guided photonics curricula written by industry professionals. In addition to laboratory skills, students are offered one-on-one support and career advice, including résumé and LinkedIn profile building.
Recent OSSC Meeting
10 January 2018
Cal Poly Pomona Students presented talks on their optics projects:
“Image Analysis in IR Astronomy”
"Spatial Heterodyne Raman Spectrometers
in Deep UV”
Recent OSSC Meetings
14 March 2018
An Introduction to Spectrally Controlled
Interferometry for the Measurement of Flat and Spherical Optics
Donald (Don) A. Pearson II
Äpre Instruments, Tucson, Arizona
Conventional interferometry is widely used to measure spherical and flat surfaces with nanometer level precision but it is often plagued by back or multiple surface reflections. At this meeting, a new method of isolating the measurement surface by controlling the spectral properties of the source (Spectrally Controlled Interferometry - SCI) will be described. Using spectral modulation of the interferometer's source enables formation of localized fringes where the optical path difference is non-zero. As a consequence, it becomes possible to form white-light like fringes in common path interferometers, such as the Fizeau or Twyman-Green. SCI technology does not require mechanical phase shifting, resulting in simpler instruments and offers the ability to upgrade existing interferometers. Furthermore, SCI allows absolute measurement of distance, including radius of curvature of lenses, in a single setup with the possibility of improving the throughput and removing some of the pitfalls of inaccurate measurements.
7 Feb 2018
History of the Fundamentals
of Optical Coatings
Thin Film Center, Tucson, Arizona
Nowadays the calculation of the properties of an optical coating is a quite easy matter. We open a computer program, decide on the wavelength, enter the sequence of thicknesses and refractive indices and launch the program. However, it took us roughly two thousand years to develop the necessary concepts and the story is an integral part of the history of optics itself. We start with the early Greeks in Alexandria, move to the Islamic scientists who built on their findings, and follow the trail to Europe where the ideas of refractive index, wavelength and interference were finally developed as we know them today.
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