Contact experts in Optics to get answers
1,419 views 788 posts
Questions related to Optics
Obviously, the spatial light modulator (SLM) and digital micromirror device (DMD) is diffration gratings. Therefore there would be multiple diffraction orders of the created images. Here I want...
07 May 2020 600 8 View
Hello! I need to conduct an experiment, where I should measure thicknesses of different thin films (oil on the water surface, soap bubble etc.). Due to quarantine I have no opportunity to use any...
21 April 2020 9,640 2 View
I have been search for UVC LEDs recently. However, finding an LED with a peak wavelength below 240nm is becoming difficult. Can suggest a way to obtain an easy solution for this. I am aware of...
13 April 2020 641 5 View
Mostly, CCD camera is used for speckle measurements. I am interested to do measurements with cmos camera, are there any characteristics of cmos camera which can effect my measurements? e.g a...
02 March 2020 3,792 6 View
I am trying to create some pattern with a DMD (digital micromirror device) and I want to configure a FPGA to drive the DMD but I'm running into some problems.
16 February 2020 9,712 3 View
I have three collimated optical beams with 1cm separation between the adjacent one. I want to shift one of the three beam laterally so that it goes closer towards or farther away from the adjacent...
01 January 2020 7,818 8 View
I am making a polar moke setup and need a non-polarising beam splitter which splits the reflected light but not the incoming one. I would be grateful for any suggestion regarding model number/...
15 November 2019 5,983 3 View
Dear all, I recently meet a problem when I use RCWA codes. In the same structure, it tooks fewer time when using the FDTD solution. I need set a lot of orders to calcuate the structure which can...
03 November 2019 4,853 2 View
Dear Sirs, The setup for the dispersion measurement is as follows. Hg lamp, collimator, goniometer with triangular prism. We measure the light dispersion using the prism. To do so we determine...
26 October 2019 2,634 8 View
I currently work with polycaprolactone, which has a low melting point (~60C), but poor transmittance without heating close to the melting point. Please suggest a low melting point polymer (70%)...
25 October 2019 579 1 View
I had this question for years. I frequently (like almost always) find optic designs that expand collimated SMF output into larger diameter beams (something like two achromats after a small...
02 October 2019 8,135 7 View
We have LG10 beam only and we have to get HG(1,0).
01 October 2019 7,642 6 View
In a camera (photography), the depth of field/view describes a volume within which objects are acceptably in-focus. Can this behaviour be reversed for a projector to allow the same focal setting...
02 August 2019 4,572 3 View
I am trying to get output of laser beam from a FOC laser beam with diameter ranging from 100 microns to 1000 microns. The FOC diameter is 200 micron and NA is 0.22. What kind of lens or...
03 July 2019 5,945 3 View
I am trying to understand how the depth information in SD-OCT A-scans is obtained over distances far in excess of the source coherence length. From what I have gathered so far, it seems that the...
11 June 2019 6,906 2 View
Need to have high efficiency around 600 nm. Thanks!
10 April 2019 2,935 5 View
Hi everyone. I konw Gaussian matrix in is very useful in mathematics. But in some applications, we need to transfer the mathematical formula and implement it into the real world. Talking about...
04 April 2019 7,851 7 View
I understand that the compressed air for the laser optics purge (first step of cleaning) such as mirrors or lenses should be "clean", but does anybody can explain me what really does it mean...
02 April 2019 8,110 5 View
Hello everyone. In my research I have come across the need for a material or coating that has the property that it is transparent for horizontally polarized light, while reflective for vertically...
02 April 2019 7,238 3 View
I need to study the surface of nylon-6 blank fibres with a thickness of nearly 40 micrometre, I work in optics lab with many optical components such as beam splitters, lenses, mirrors ... etc, can...
19 March 2019 348 3 View
I need surface reflectance in Sentinel 2 images, What is the best way to perform atmospheric correction in SNAP? Using Sen2cor plugin?
15 March 2019 9,096 4 View
Hello, I want to very accurately measure the distance between my microscope objective and my substrate using is an optical fiber sensor from Philtec. In order for the fiber optic to work, the...
11 February 2019 2,014 2 View
Hi, Maxwell Stress Tensor (MST) method is usually used to calculate the optical force exerted on an object. However, my question is about the applicability range of this method. When do we use...
29 January 2019 4,347 3 View
I need to understand the concept of bright mode and dark mode completely. I know that by the destructive interference of bright and dark modes we achieve PIT but what is exactly bright and dark mode?
11 January 2019 1,579 3 View