Posts with the tag optics
Creating a Gaussian Window in 3D Using Matlab
If you want to create a gaussian window with Matlab in three dimensions (as you can do in two dimensions with the built-in gausswin()) you can use the function gauss3D() found on MATLAB Central:
S = gauss3D(20,20,7); slice(<span...
New Focus Picomotor Ethernet Controller 8752 – TCP/IP Control
We use the modules 8752 and 8753.
List of commands
Common Commands
| Syntax | Command | Manual Page |
|---|---|---|
AIN <device> <channel> |
Read/Display Analog Input | 61 |
DEF |
Load Default Parameters | 62 |
DIAG <driver> |
Display Diagnostics Byte from Device | 62 |
IN <device> <channel> |
Query State of Digital Inputs | 89 |
LOCK |
Lock Out Other Input Devices | 63 |
MAP <joystick-device>=<driver> |
Set/Display Device-to-Joystick Mappings | 64 |
OUT <device> <channel>=<value> |
Set Digital Output | 65 |
SAV |
Save Parameters | 65 |
UNLOCK |
Unlock Other Input Devices | 66 |
VER |
Query Firmware Version | 66 |
Picomotor Control Commands
<table class="table...Light Wavelength from Energy
You can use the following Python function to convert a photon energy (in electron volts) to the corresponding wavelength (in nano meters):
def wavelength_from_energy ( electron_volts): """Returns a photon wavelength in nm from a photon energy given in eV.""" ...
Shimadzu 30-002 - Laminar-type Replica Diffraction Grating for the Soft X-ray Region
This is a fancy flat-field focusing, holographic grating as opposed to the previously used Rowland gratings.
Product Description
- Aberration-corrected Laminar-type Replica Diffraction Gratings for flat-field Polychromators in the range of Extreme Ultra-Violet Light(EUV:13nm). Suitable for the next generation of semiconductor lithography.
- Less high order light due to laminar type grooves configuration, Low...
Estimate the transform limited beam duration of a laser pulse from its spectral width in nm in Python
A transform limited pulse has a time-bandwidth product of for Gaussian beams.
Here are a couple of Python functions to find the minimum duration of a gaussian pulse with a certain spectral FWHM (measured in nm) at a given central wavelength plus the...
Convert between plus-cylinder and minus-cylinder notation in eyeglass prescription writings using Python
Doctors in Germany usually give out prescriptions with negative values for the cylinder. Some eyeglass manufacturers list their products with plus-cylinder notation so the optometrists have to convert the notations.
Online Converter
If you want to convert your prescription writings, I created this online tool to convert your values:
It...