Hi guys!

Is there any interest in L/2 achromatic waveplates?
The advantage of achromatic waveplates is that they can be used for a wide wavelength range. Standard waveplates are suitable for narrow spectral ranges (XXXnm +/- 15nm or less). Achromatic waveplates can cover almost the entire VIS range. I got a quotation for 10mm round or 11x11mm square waveplates for a 430-665nm range.
They are more expensive as single wavelength waveplates but may save money and space inside the module on the other hand. For example, when you build a dual wavelength module doubling each color with a pbs, you have four diodes and need two waveplates and two pbs cubes. With an achromatic waveplate you can just combine two colors with a dichroic mirror and shoot the beam directly through the pbs. For the second diode pair you place the waveplate between the dichro and the PBS.


material quartz and MgF2
optical contacted for high power
size 11x11mm or 10mm +0/-0.2mm
retardation L/2 for 430-665nm (tolerance < L/100)
both sides AR coated
Price: 60€