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Optical System Optimization: Analyzing the Effects of Stray Light Feb 24, 2017 — Electrical engineers are very familiar with the effects of shot noise, thermal noise, flicker noise and crosstalk, and recognize how these effects can reduce the signal-to-noise ratio (SNR) in their systems. Most optical engineers, on the other hand, frequently fail to appreciate the effects of optical noise in their systems, leading to non-optimal performance. This can be particularly significant in astronomical observations, low-light level signal detection and medical imagery, where
Measuring Aspheres: Selecting the Best Technique Aug 1, 2016 — The benefits of aspheric lenses are numerous: They allow for a reduction in spherical aberrations and are ideal for focusing or collimating light, as they can achieve a low ƒ-number. Aspheres also allow the same or better performance using fewer...
Aspheric Lenses: Optimizing the Design Sep 1, 2015 — This second of two articles discusses the tools optical designers need to tailor their designs to the appropriate manufacturing process, optimizing the cost of component fabrication.
Flat Optics: Considerations When Buying May 28, 2015 — To simplify the process when purchasing flat optics, we will discuss the top six factors from a manufacturer’s perspective, all of which affect the three major areas of the purchasing decision: quality, delivery and cost. Flat optics generally...
Aspheric Lenses: Design Considerations Apr 27, 2015 — This first of two articles will cover design and manufacturing options for aspheres; the second will include more detail on manufacturing and testing processes. These articles will provide the tools optics designers need to tailor their designs to...
Optical Design Software: Fundamentals and Potential Feb 5, 2015 — Enhanced interface usability in modern design software enables even inexperienced lens designers to build well-performing optical systems. Optical design software allows the user to develop a configuration of optical elements that manipulate the...
Understanding Surface Quality: A Practical Guide Feb 4, 2015 — Surface quality is one of the most scrutinized specifications in the optics industry. It is critical that the suppliers and customers have a consistent approach during the inspection process. These guidelines are intended to help ease communication...
Excimer Optics: High Power Demands High Reliability Jan 1, 2015 — The excimer laser, a powerful source of UV radiation, has accelerated its move from the research laboratory to industrial and commercial applications such as photolithography, mate...
Optical Materials: Double-Sided Lapping and Polishing Jan 1, 2015 — Double-sided lapping and polishing utilizes planetary action with the combination of a top and bottom plate to precisely grind and polish precision, parallel optics. Double-sided processing is a batch-type process that uses planetary action –...
Passive Athermalization: Maintaining Optical Performance Over Temperature Jan 1, 2015 — An optical system is athermalized if its critical performance parameters (such as modulation transfer function, back focal length and effective focal length, etc.) do not change appreciably over the operating temperature range. For rotationally...
Plastic Optics: Specifying Injection-Molded Polymer Optics Jan 1, 2015 — The versatility of polymer optics opens new doors for optical designers who understand the whys and hows of specifications. The use of precision polymer optics is becoming an increasing necessity today as products demand sophisticated light handling...
Thin-Film Coatings: A Buyers' Guide Jan 1, 2015 — What are thin-film coatings? Optical thin-film coatings modify the transmittance and reflectance properties of the substrate material to which they are applied. This article provides an objective overview of typical performance characteristics,...
Ultraviolet Filters: Past and Present Jan 1, 2015 — Bandpass filters are passive optical devices that control the flow of light. They are used to isolate certain wavelengths or colors. Applications range from detecting the gaseous composition of a distant star to visualizing the chemical
Optical Delay Lines: Key to Time-Resolved Measurements Dec 8, 2014 — To obtain an accurate means of creating reliable delays in any time-resolved spectroscopy or dynamic experiment, several factors about the delay line stage must be considered to reduce or eliminate errors associated with linear stages. One of the...
Acousto-Optic Devices Mar 8, 2009 — Charts showing the characteristics of acousto-optic scanning devices, acousto-optic figures of merit, and solutions for common problems with acousto-optic processor devices.
Beryllium Mirrors: Refinements Enable New Applications Mar 8, 2009 — Beryllium mirrors are finding commercial applications, while maintaining their military and space applications. Refinements in design and improvements in manufacturing technology have cut costs and new coatings have enabled high-power applications...
Camera Resolution: Combining Detector and Optics Performance Mar 8, 2009 — Most image-quality discussions center on resolution, which is thought to uniquely determine system performance. Resolution, however, is a more complex concept. Camera resolution depends upon the optical blur diameter and the detector size. Schade...
Cleaning Optics: Choosing the Best Method Mar 8, 2009 — Cleaning optical elements improves performance, providing proper materials, techniques and handling procedures are used to minimize the risk of damage.
Common Lens Formulas Mar 8, 2009 — Formulas for lens focal length, magnification, relative aperture (f/#), object-to-image distance, object-to-lens distance, lens-to-image distance and numerical aperture.
Component Choices: Avoiding Tolerancing Mistakes Mar 8, 2009 — Designing an optical system involves more than simply understanding the theory behind optics. To design a system efficiently and economically, it is important to understand the capabilities of an optical shop and the interaction of the...
Diamond Machining: Ultraprecision Machine Technology Mar 8, 2009 — Ultraprecision machining can be defined in general terms as the removal of material from a substrate utilizing a machine tool that operates at a resolution of 10 nm (0.4 μin.) or less. The machining process may take the form of single-point...
Digital Still Cameras: The Changing Face of Imaging Mar 8, 2009 — The digital camera reflects a sea change in the compact camera market. While the 20th was the century of film cameras, the 21st belongs to the digital camera. The digital camera re...
Filters: Glossary, Equations, Parameters Mar 8, 2009 — The following is a list of terms commonly used to describe the spectral characteristics of filters. Attentuation Region (or Blocking) The spectral region over which very low transmission is required. Attenuation requirements are generally specified...
Gaussian and Newtonian Thin Lens Formulas Mar 8, 2009 — Four important equations from which the image distance and the lateral magnification can be computed for an object at any arbitrary distance from a thin lens.Equation (1) is known as the Gaussian form of the lens equation, after the mathematician...
Illumination Design and Analysis Software: A Vital Tool in the Designer’s Kit Mar 8, 2009 — Optical systems design and analysis software is a key element in an optical engineer’s toolkit. Simulation allows virtual tinkering with a system problem before ever creating — and in some cases eliminating — a prototype. The results can be analyzed...
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