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HowTo: Spatial Light Modulators
About This Tech-Talk Spatial light modulators (SLMs) are active optical components that can alter a light beam’s amplitude, phase, or polarization. For this tech-talk, I’ll focus on a specific subset: those that achieve this using a pixelated, two-dimensional array. While this doesn’t cover all types of SLMs, it’s a sufficiently large and interesting category to…
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Designing a point diffraction interferometer
In this tech talk, we will dive a little deeper into the design of a point diffraction interferometer, or PDI for short. We have talked about it a little superficially in an earlier tech talk but this time, there should be enough for anybody who may consider building one. This application is well supported by…
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RealHolo – More than Meets the Eye
RealHolo is an EU-funded project aiming to produce a reflective, micro-mirror array, spatial light modulator with the aim to “pave the way for mainstream mixed reality environments”, quoting the project site verbatim. However, if we pop the hood and look inside, we will find that with the specifications and technical targets already achieved, RealHolo is…
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Spatial Light Modulators
One of the more complex photonic devices one will encounter as an optical engineer is the spatial light modulator. This is a device that (usually) converts a computer-generated signal into a spatially controlled distribution of intensity or phase, depending on the type of modulator. A very well-known device for intensity modulation is the DLP or…
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Coherence
Coherence is perhaps the most interesting property of light and arguably, the effects of interference are at the core of what we consider to be the field of optics. Yet, you don’t have to look too far to find an optics specialist that simply will not have anything to do with it. In practice, we…
Category: Optics
Physical and optical phenomena
