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3 Keys To Quality Double Gaussian Lens Design
One of the most common lens system designs- especially in photography- is what is called a Double Gaussian lens. There are several different configurations, and close to 90 different patents have been filed from 1936 – 2010. One of the reasons this lens design configuration is so popular is that it corrects many of the major image aberrations with a relatively low number of optical elements.
Laser Beam Caustic: Explained
One parameter that can be used to evaluate the quality of a laser beam is what's called a Beam Caustic. A caustic, in general, is an “envelope” that defines the extent of a beam of light after they have been refracted (or reflected ) by a curved surface. As the...
Laser Rayleigh Range: A Detailed Explanation
When working with lasers it is important to understand the physical parameters that define system performance. Some of these specifications may be more familiar than others. For example concepts like wavelength and divergence are commonly used when describing the...
Laser and Adaptive Headlight Tech Explained
We explained the use and design of laser headlights and adaptive headlights in auto industry
Aviation Light Optic Design
In the last month, I have had the need to travel several times by airplane. So, after several hours enjoying $15 sodas, and $30 hamburgers at the airport gates, I started paying more attention to the different illumination systems that are being used in the aviation...
RXI Collimators explained
Optical collimators also called non-imaging concentrators are optical components that can collect and project light from a source. Common examples include solar collectors that concentrate the sun's light and project it to heat a surface or direct it to solar panels....
Non-Contact Tonometers
This will be the last entry in our series of optical instrumentation for optometry. If this is the first article that you are seeing, I would suggest that you take a look at our previous articles about Ophthalmoscope Design, Keratometer Design, and Retinoscopy. This...
Ophthalmoscope Optical Layout
In the next couple of articles, we will talk about the different instrumentation used by ophthalmologists and optometrists. As you can imagine, there are many restrictions when designing an optical instrument that will be used in a patient. It matters whether the...
Scan Mirrors In Industrial Welding
This is our last entry on our scanning mirrors series. In this article, we will talk about the use of scanning mirrors when working with welding environments. As you can imagine, not only do the optical requirements differ when compared to those of a scanning...
Steering Mirrors In LIDAR Systems
This is our third installment of a four-series blogs about steering mirrors. We have talked previously about steering mirrors in laser markings and steering mirrors in OCT systems. This week, we will talk about the steering mirror requirements for those in LIDAR...
Understanding objective lenses
Introduction In previous entries, we have talked about the design of scanning microscopes, infinity corrected microscopes, confocal microscope design, and Koehler illumination systems-a common illumination system in microscopes. The most essential microscope element...
Rigid Endoscope Design
Endoscopes are medical devices designed to collect the smallest images from inside the human body. Endoscopes can be divided into two categories: rigid endoscopes, in which relay lenses are stacked together generally creating a high-quality image, and flexible...
Cardinal Points
When I was a young undergrad engineering student, I always found optics to be a very confusing subject. It was not only the equations, but what it looked like hundreds of different definitions involved in even the simplest of optical systems. Some concepts, like...
Powell Lens Design
Previous posts have reviewed different techniques for beam homogenization as well as the difference between spot size and beam angle. This post will review a method for beam shaping using Powell Lenses. Powell lenses are lenses that create a straight laser line by...
Calcium Fluoride Glass: An Overview
The choice of glass is a fundamental part in the optical design process. This is especially true for IR and thermal optics materials. In this article, we will review Calcium Fluoride (CaF2), an interesting glass that has a wide range of applications. Before we start,...
Beam Splitters: Explained
Beam splitters are a fundamental element in optical systems. Beam splitters are, in essence, optical components used to divide a single light source (usually a laser) into two separate beams. The more common kind of beam splitters (the kind that you can find in most...
Koehler Illumination
When designing any optical system, an optical engineer needs to consider how illumination will be used: specifically, how the illumination could affect the way the image is created. If not carefully designed, some illumination systems may create a kind of...
Tessar Lens Design
Among the many lens design configurations, one of the most common lens optical layouts is the Tessar Lens. This layout was created by Paul Rudolph in 1902 for photographic lenses. In the golden age of film photography, the...
M squared and designing laser beam optics
There are different ways to calculate the quality of a laser beam. In general, we want our laser beam to be as close to a theoretical Gaussian Beam as possible. The question then is how do we measure the profile of our beam and how do we compare it against our ideal...
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