Which components can replace the lenses?

More Vladimir Farber's questions See All

What is the best programming language for Deep Learning?

Deep Learning became very popular theme in many research areas so I think it worth investing in learning this tool. The open question is which programming language is better for this aim and why?...

10 November 2018 1,116 1 View

Does there is some reason to learn Golang when there are languages such as Python, C++ or MATLAB?

Golang is relatively new language and I am not familiar with him (but I'm considering whether it's worth learning in the future). It is interesting, for each applications it can outperform...

10 November 2018 6,162 0 View

Which practical advantage have Python over the MATLAB?

I am not familiar with Python(but I want to learn it), for image processing purposes I am use MATLAB and it is usually enough for me. For which image processing purposes Python can have advantage...

09 October 2018 7,193 20 View

Which is the best image segmentation technique that you know?

Which is the best image segmentation technique that you can recommend? Please give references and links on the relevant MATLAB code implementation. Thank you in advance!

06 July 2018 9,193 5 View

Why the blood of the relatives is not recommended in the case of the autoimmune hemolytic anemia ?

Can anybody explain in the simple form why the blood of the relatives is not recommended in the case of the autoimmune hemolytic anemia? Thank you in advance.

08 September 2016 10,006 1 View

Is model beer lambert valid for monolayers?

From the literature absorption of single mono layer of graphene is about 2%, when using the calculation based on model of Beer-Lambert for gold or silver the obtained result is also about 2%. From...

07 August 2016 6,200 5 View

What is the difference in the dielectric anisotropy of polar and non-polar molecules?

Can someboddy explain this from the physical point of vew? Thank you in advance.

03 April 2016 6,159 1 View

How I can show on the smartphone monitor the same that I see on the computer monitor?

Does somebody know a way or devices, which can help to do that? Thank you in advance!

31 December 2015 6,368 2 View

Which objects have narrow reflected wavelength range in the visible and very NIR light?

Which objects with narrow reflected wavelength range can you recomend (and give references/links why you desided that these objects have narrow reflected wavelength range). I need this information...

10 November 2015 2,795 4 View

Can somebody give example/link how can I connect two figures in Matlab's Graphical User Interface (GUI)?

For simulation I need connect few figures in the GUI, but when I open second GUI from the first, for example by adding the function gui2fig=open('secondgui.fig') in pushbutton's callback function,...

03 April 2015 7,577 3 View

Problems about acousto-optic coupling in Comsol, how to check whether the moving mesh is correct?

I’m trying to reproduce the acousto-optic coupling simulation in the paper Frequency–angular resolving LiDAR using chip-scale acousto-optic beam steering. LNOI(lithium niobate on insulator) is...

13 August 2024 9,795 0 View

Geotechnical Engineering (Proceedings of the ICE) time review?

Hello everyone, I recently submitted an article to Geotechnical Engineering (Proceedings of the ICE), and the current status has been listed as "EiC Pre-assessment: Ready" for the past 20 days. I...

10 August 2024 6,493 1 View

Can't spin-orbit coupling(SOC) be included in optical properties calculation in CASTEP?

I am currently using CASTEP version 2020. When I want to run optical properties calculations with spin-orbit coupling(SOC), I encounter the following error in a pop-up window before the job gets...

02 August 2024 2,890 0 View

How to correctly use the UTE and ZTE pulse sequences in Bruker's ParaVision software?

I am using a Bruker 600M solid-state NMR spectrometer with a Micro 2.5 microimaging system. The test sample is a tube of 1M LiCl aqueous solution, and the nucleus detected is 1H. I am trying to...

01 August 2024 9,227 1 View

Can a Conventional 50W visible LED Lamp Emit UV Light?

I'm researching light sources and their UV emissions. I'm curious if a 50W, 7500K conventional LED lamp emits any UV light. I found that a 200W tungsten lamp can emit up to 1.5 mW/cm² at 350 nm....

31 July 2024 3,843 7 View

How to find projects for a team of professional developers in AI?

We are looking for projects for a team of professional developers About us We are a team of experienced developers with over 10 years of experience in various programming fields. Our mission is to...

30 July 2024 8,377 0 View

Why do some of my Raman spectra show no signal at lower Raman shifts?

I'm using a InVia Renishaw Raman microscope system (785nm wavelength, 600l/mm grating density) to acquire Raman images on human brain samples, at 50um resolution. The samples are placed on MgF2...

30 July 2024 8,771 3 View

What should a Mechanical Engineering PhD scholar focus on during their PhD to enhance their chances of securing a postdoctoral position?

29 July 2024 7,714 4 View

May I know the exact Quartile of the journal- Advanced Engineering Materials (Wiley) for material science category?

In some data sources it has been grouped in Q1 and some shows it is Q2.

29 July 2024 4,227 2 View

Ternary in Electrical Engineering?

Dear Research Community I would like to invite Elctrical Engineering specialists to solve problems related to Ternary Algebra or tripple sets I have an algorithm that places in relation three...

28 July 2024 5,771 2 View

V. N. Ravi Kishore V.

Can you be more specific your question.

What is the application you are interested in?

What are the problems you are facing with lenses?

C.G Treviño-Palacios

the first answer is mirrors. they act the same as lenses but without chromatic aberrations. Pinhole imaging is another option. For periodic object talbot like effects does the trick. It depends on the actual application

Vladimir Farber

Ravi, I mainly interested in the lensless 3D imaging. I interested understand is there any significance to direct my research in this direction.