Spatial Light Modulator Software
All HOLOEYE Spatial Light Modulators are addressed like a monitor device via standard DVI or HDMI. This means the SLM actually acts like a standard monitor device (e.g. in extended desktop mode for a second monitor) und no special software or drivers are necessary to operate the SLM. No matter which software is used to calculate optical functions, if you are able to address a bitmap image on a second monitor output of the graphics card you are able to operate the SLM. Also standard image viewer software can be used.
For an easy start and even more convienent operation HOLOEYE provides a Pattern Generator Software (for calculation of different optical functions) and a Slideshow PLAYER software (for easy adressing of precalculated functions or images on the SLM) with each Spatial Light Modulator device.
SLM Pattern Generator Software
The HOLOEYE Spatial Light Modulator Pattern Generator software was developed for use with all HOLOEYE SLM models. The software allows the simple generation of diverse dynamic optical functions like gratings, lenses, axicons and apertures as well as the calculation of diffractive optical elements (DOE) from user defined images.
Computing Diffractive Optical Elements
Possible image formats are BMP, PNG, JPEG, GIF, XBM, XPM, MNG and the different PNM formats: PBM (P1 or P4), PGM (P2 or P5), and PPM (P3 or P6). The DOE is computed by using an iterative Fourier Transformation Algorithm (IFTA). The image will be transformed to an image with 256 gray-scale values. In order to display all 256 gray-scale values a monitor setting of minimum 16 Mio. colors (24bit) is required.
The calculated output DOE image can be addressed directly on the SLM out of the application software. The DOE image will be tiled to cover the whole SLM display area. Additionally the DOE functions can be superimposed by lens functions or prism fuctions in X and Y direction. The focus / strength of these functions can easily be adjusted via a task bar using a slider or by entering a value directly.
Elementary Optical Functions
Besides the generation of DOEs a wide range of basic optical functions can be created directly via the menue bar. After input of the required parameters the output image appears in a new window. There are several binay and multilevel optical functions possible:
- Blank Grey Level Screen
With this function you can create a homogeneous gray level screen.
- Horizontally Divided Screen
With this function you will create a horizontally divided screen, constitng of two homogeneous graylevel partial screens.
- Random Bitmap
With this function you will create a random pixel distribution using 256 grayscale values. This function can be used to realize the optical function of a random phase plate.
- Random Binary Bitmap
With this function you will create a random pixel distribution using only two grayscale values. This function can be used to realize the optical function of a random binary phase plate.
- Aperture Functions
- Rectangular Aperture
- Circular Aperture
- Single Slit and Double Slit
- Fresnel Zone Lenses
- Binary Fresnel Zone Lens
- Multilevel Fresnel Zone Lens
- Cylindrical Fresnel Zone Lens
- Binary Axicon
With this function you will create a Binary Axicon graylevel image representation.
With this function you will create a 256-level Axicon graylevel image representation.
- Vortex Phase
Use this function to create a 256-graylevel image representation of a vortex phase.
- Concentric ring segments
Use this function to create binary images consisting of concentric ring segments.
- Binary beam-splitter gratings
- Linear Gratings and Crossed Linear gratings
- Exemplary binary beam-splitter designs
- Sinusoidal Grating
With this function you will create a sinusoidal grating.
- Blazed Grating
With this function you will create a blazed grating.
- Calculating a beam-shaping phase function for Gaussian Input beams
- Transformation of a Gaussian beam to a circular ‘flat-top’ beam
- Transformation of a Gaussian beam to a rectangular ‘flat-top’ beam
- Superposition with an additional phase map
e.g. for compensate for aberrations of the optical system or that of the SLM
SLM Slideshow Player Software
The SLM Slideshow Player software is intended to ease the display of images and image sequences on HOLOEYE Spatial Light Modulator devices. These image files may represent phase maps (if the SLM is set up as a phase modulating device) or amplitude distributions (if the SLM is set up as an amplitude modulating device utilizing a polarizer).