Understanding image depth of field
Depth of field is a distance range where the image optical resolution is as high as possible for that lens, i.e. an image appears to be in focus. When starting a lens design program, having a good understanding of this parameter’s physics will help you and your consultant achieve the best possible design. In this […]
Phase Shift Method for distance measurement
Optical techniques for distance measurement offer plenty of uses and applications. These techniques are able to measure the distance between two objects without touching them, making them perfect for a variety of situations. Optical techniques are usually the best solution when needing a noncontact method that’s fast or automated. For example, they are often used […]
The Role of F-theta Lenses in Laser Scanning
Introduction to f-theta Lenses In the landscape of optical systems, the introduction of f-theta lenses is an important chapter, offering a solution to the challenges posed by traditional lenses in laser scanning applications. As laser technology becomes more prevalent in applications from engraving to intricate material processing, the need for precision and consistency in focused […]
Understanding the optics behind a PAPI light
In a previous article we talked about Aviation Light Optics. and discussed a runway light system called Precision Approach Path Indicator (PAPI). Now we would like to go more in detail into PAPI design and describe their design requirements. The PAPI system is a set of four light sources that help the pilots correct the […]
Mastering Spot Diagrams: Analyzing Optical System Quality | OFH
Introduction to Spot Diagrams As optical engineers, we use different tools and techniques to evaluate the performance of an optical design when simulating the system in a ray tracing program. One of those tools are spot diagrams. They may be a little bit confusing to use at first but are an excellent way to communicate […]