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Questions related to Optics
How to settings the adsorption and refractive index for measuring particle size in suspended using a Malvern Mastersizer 3000 E?
10 July 2017 8,302 4 View
When simulating light pipes, will the choice of a source (collimated beam vs angular beam) make any difference on the efficiency of the light pipe to channel light from source on one end to the...
05 July 2017 3,365 3 View
Hi, Any advice on how to track stem cells in vivo for
29 June 2017 6,730 3 View
I have a bulk quasi-phase matched non-linear crystal with waveguide dimension of 5um*4.5um, as provide in this link http://www.hcphotonics.com/products2.asp?area=1670&cat=1751&sn=938. Is...
25 June 2017 5,276 2 View
Hi everyone, What configuration of lenses is utilized to make light sheets for imaging purposes?
19 June 2017 6,344 3 View
Is there a concept of optical oscillators (like an electronic LC oscillator) or a tunable laser can be used as an oscillator?
09 June 2017 1,642 3 View
I am looking for a high power LED with a central wavelength of around 488 nm. I know Thorlabs sells one at 490 nm that supplies 216 mW of optical power at 488 nm. However, I need at least 1 W at...
02 June 2017 4,329 3 View
"One of the most fascinating predictions of the theory of general relativity is the effect of gravitational lensing, the bending of light in close proximity to massive stellar objects. Recently,...
31 May 2017 8,824 3 View
I have removed Fresnel lens from rear projection TV but it is plane/smooth/without grooves/without Newton rings. It concentrate the solar radiations to some extent. The Fresnel lens with grooves...
30 May 2017 285 3 View
Is it possible that there is a kind of amplifying mechanism, that just like EDFA to amplify 1550 nm optical light, to amplify ultrasound signal?
22 May 2017 8,868 3 View
I see that many papers based on film random lasers (like polymer films) show very low lasing threshold compared to colloidal random lasers (like rhodamine6G based ones). Is this true in every...
12 May 2017 969 3 View
I need an answer on that question
06 May 2017 1,739 3 View
I am trying to simulate an aperture type FSS, but during oblique incidence, i am getting discontinuity at an offset of the resonance frequency. Can anyone explain the reason?
03 May 2017 2,138 3 View
Considering a Hermite-Gaussian (HG) Beam as a perfectly plane wave and ignoring the phase due to curvature(exp(ik(x^2+y^2/2R)), the phase of lobes is pi phase shifted from its neighbor. When we...
01 May 2017 4,515 5 View
I would like to video-record insects under IR light (850nm) in a way to see insects white on a dark background. However, a black material is prohibited because it impact the behavior I would like...
27 April 2017 9,394 7 View
Since we need to find the change in refractive index with respect to the propagation direction, does it really need a variable angle ellipsometer?, so that change in angle results in change in...
25 April 2017 8,815 4 View
The sample is a porous oxide layer on Aluminum produced by plasma electrolytic oxidation. Already, the sample employed for corrosion studies around 1000 h. Then, the corroded sample was...
23 April 2017 6,894 5 View
View signal visualuzer in optisystem give results of x and y components of dual polarized signal with real and imaginary parts . Is there any method to combine real and imaginary parts of x and...
18 April 2017 566 2 View
I generate orthogonal spatial modes like Hermite-Gaussian or Laguerre-gaussian from two different laser sources. Thus coming from incoherent sources will they not be orthogonal? Or in other words...
14 April 2017 4,516 2 View
In Wikipedia, it is said that quantum dot laser "avoid some of the negative aspects of device performance associated with traditional semiconductor lasers based on bulk or quantum well active...
09 April 2017 6,381 3 View
if in chromatic confocal sensor, a led with low coherence and a multi-mode fiber are used. I wonder this imaging process should be the which one ? In the monograph about fiber optical confocal...
05 April 2017 6,267 3 View
I have a parabolic mirror and want to place some optical fibers at the focal point in order to transmit light inside a climate chamber. Which optical fibers would you suggest?
02 April 2017 7,445 7 View
Now there are many Superluminescent Diode with a 3dB bandwidth of about 100 nm on sale. And they also provide SLD modules with a 3dB bandwidth of about 400 nm, by combining 4 SLDs, which is much...
30 March 2017 8,881 4 View
Here is how I think: 1. Homodyne needs to split the light into two branch of BPDs; ->1/2*P_signal due to 3dB coupler. 2. Heterodyne has intermediate frequency; -> 1/2*P_signal due to cos/sin...
28 March 2017 4,941 1 View