Achromats for fs-Pulses
Twin lens air spaced achromats (Fraunhofer achromats), back focal length achromatized at 790 nm, corrected for constant pulse propagation time (vs. aperture) for fs pulses with 790 nm. Available focal lengths 60 mm and 80 mm, free aperture 20 mm, antireflection coated for the wavelength range around 790 nm, in cylindrical holder (Ø 25 mm x 17,5 mm).
We have available for this objective a drawing of the holder dimensions with some additional data about integration.
OFS 8.3.20| OFS 8.3.20 focal length +60 mm |
OFS 8.4.20 focal length +80 mm |
|||
| wavelength | calculated focal length |
calculated back focal length |
calculated focal length |
calculated back focal length |
| 404,7 nm 488,5 nm 546,1 nm 632,8 nm 700 nm 710 nm 740 nm 780 nm 790 nm 800 nm 850 nm 890 nm 900 nm 1064 nm 1300 nm 2000 nm 2300 nm |
61,076 mm 60,294 mm 60,096 mm 59,969 mm 59,933 mm 59,931 mm 59,925 mm 59,925 mm 59,925 mm 59,925 mm 59,935 mm 59,946 mm 59,949 mm 60,024 mm 60,185 mm 60,945 mm 61,407 mm |
53,310 mm 52,517 mm 52,312 mm 52,177 mm 52,137 mm 52,133 mm 52,127 mm 52,124 mm 52,124 mm 52,124 mm 52,131 mm 52,141 mm 52,144 mm 52,213 mm 52,367 mm 53,108 mm 53,560 mm |
81,924 mm 80,634 mm 80,308 mm 80,090 mm 80,023 mm 80,018 mm 80,003 mm 79,998 mm 79,997 mm 79,997 mm 80,002 mm 80,016 mm 80,017 mm 80,111 mm 80,322 mm 81,347 mm 81,977 mm |
73,330 mm 72,088 mm 71,777 mm 71,572 mm 71,510 mm 71,506 mm 71,493 mm 71,490 mm 71,489 mm 71,490 mm 71,497 mm 71,511 mm 71,513 mm 71,609 mm 71,821 mm 72,842 mm 73,469 mm |
- Achromat for fs-Pulses, focal length +60 mm → OFS 8.3.20
- Achromat for fs-Pulses, focal length +80 mm → OFS 8.4.20
Achromats for fs-Pulses with negative focal length
For the setup of laser beam expansions without focus we have available an achromat which is constructed following the same principles. Focal length –20 mm, free aperture 7 mm, antireflection coated for the wavelength range around 790 nm, in cylindrical holder (Ø 25 mm x ca. 15 mm).
We have available for this objective a drawing of the holder dimensions with some additional data about integration.
Ordernumber:→ OFM 8.3.07
Available on special order
- Femtosecond achromats with other focal lengths or other free apertures → on request
- Femtosecond achromats for other wavelength ranges → on request
- Apochromatic femtosecond objectives fur simultaneous use with two femtosecond lasers or with doubled / tripled pulse frequencies → on request
Literature
Z. Bór, Journal of Modern Optics 35, (1988), p.1907-1918