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Tutorial Selection of vibration isolators Abstract Controlling or isolating vibration caused by a ground motion or an acoustic noise is critically important in precise optical fabrications and measurements. There are two methods for controlling or isolating vibration, passive and active vibration isolation. The goal here is to compare passive and active vibration isolation and examine …

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Tutorial on Strehl ratio, wavefront power series expansion, Zernike polynomials expansion in small aberrated optical systems 1. Strehl Ratio  The wave aberration function, W(x,y), is defined as the distance, in optical path length (product of the refractive index and path length), from the reference sphere to the wavefront in the exit pupil measured along the …

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Tutorial on Strehl ratio, wavefront power series expansion, Zernike polynomials expansion in small aberrated optical systems 1. Strehl Ratio  The wave aberration function, W(x,y), is defined as the distance, in optical path length (product of the refractive index and path length), from the reference sphere to the wavefront in the exit pupil measured along the …

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Passive Athermalization of an Infrared Optical System Introduction  This tutorial will cover the design of an athermal lens mount for an infrared double-Gauss objective. This objective will need to be able to survive a space environment. It will experience large temperature changes and needs to remain in focus so imaging can occur continuously. The lens …

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An introduction to optical windows ABSTRACT  This paper provides and introduction to optical windows. Several aspects of window design are discussed and simple equations to calculate window deformation effects are provided. Several materials that can be used for window substrates are presented and their advantages and disadvantages are discussed. The coating of windows is briefly …

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An introduction to off-axis parabolic mirrors Abstract  Off-axis parabolic mirrors (OAPs) can be a useful tool in optical design. OAPs combine the achromatic and diffraction limited imaging properties of a parabolic mirror with the ability to deviate the light path off-axis, which is useful for most imaging systems. However, when used improperly, OAPs can be …

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Single Mode Fiber Coupling: Sensitivities and Tolerancing Purpose:  The purpose of this tutorial is to show the sensitivities for the coupling of two single mode fibers.  The sensitivities for the lateral and longitudinal displacement, angular misalignment, and the mode field radius mismatch of the two fibers will be discussed.  Also shown will be an example …

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