Meridian® Sol Projectors Specifications
The Meridian Sol-55 projector is a modular light source that serves as the stimulus when measuring the glare spread function (GSF) of camera assemblies. GSF is a measure of how much light from a bright source in or out of the field of view of the camera reaches other locations of the image (think of the image flare when the sun is in the field of view of a camera). The path that this “stray light” takes typically includes ghost imaging and scattering from optical and non-optical surfaces. The Sol-55 projector provides a laboratory and production floor source for characterizing GSF.
The Sol-55 was thoughtfully designed to incorporate the following features:
- Interchangeable object aperture drawers to achieve a specific object angular extent. Drawers are color coded and identifiable via a 2-wire EEPROM which is read by the Sol-55 projector when inserted and which may then be passed on to the system computer to verify the configuration.
- Source aperture wheel for controlling the lateral extent of the illumination at the DUT, thereby minimizing the effects of light scattered outside of the DUT on the measurement
- Careful baffling and special coatings inside the barrel to control any light reflected back into the lens barrel
- Factory installed color coded spacers for setting the working distance (the distance at which the source aperture – not the object aperture! – is re-imaged onto the DUT)
- Removable front objective lens for ease of cleaning to reduce scattered light from surface contamination
- High power white LED source with intensity control via a serial RS485 interface
When sold individually, Sol projectors are usually shipped with the following accessories:
- Ethernet Interface box and 18VDC power adapter for establishing RS-485 + power bus
- Ethernet Cable for computer connection
- 3-Meter long power + RS-485 bus cable from Sol projector to interface box
- Benchtop cradle stand
- Thumb drive with demo control application, manual, and instruction set documentation
- Storage case
| Sol-55 Projector Specifications | |
| Objective Lens Nominal Focal Length (mm) | 120 |
| Objective Clear Aperture (mm) | 37 |
| Maximum Object Aperture Diameter (mm) | 10 |
| Apparent Object Distance | Infinity (collimated) |
| Minimum Working Distance (for focused illumination aperture) | 100mm (must be factory configured) |
| Typical Working Distance (mm) | 100mm-300 |
| Illuminator | White LED, 3500K |
| Outside Diameter (mm) | 55 |
| Length (mm) | 270 |
| Mass (g) | 850 |
| Length | 270mm |
| Interface bus | RS485 (9600 baud), 18VDC |
| Maximum Projectors in a Single Daisy Chain | 20 |
| Power Supply Input Voltage | 100 to 240 VAC |
| Operating Temperature | 10-30 °C |
| Operating Humidity | 30-70% (non-condensing) |
All specifications subject to change
*Custom Sol projector designs available – contact sales@optikos.com with your DUT requirements
The Sol-55 projector is also offered with factory-installed fixed apertures for use cases in which the projector requirements are not likely to change. The fixed source aperture version also accommodates a larger source aperture than the aperture wheel version, which may be necessary for some larger camera systems.
Sol projectors can be quoted as standalone target projectors, or as part of a Sunfield system. Optikos product engineers are available to discuss your requirements and configure an appropriate solution for your unique metrology needs.
