Achromatic Objectives for fs-Pulses

The achromatic doublet lenses with air gap (Fraunhofer achromats) are designed for a constant back focal length in the spectral range around 790 nm. This yields a constant propagation time for fs pulses over the entire aperture at this wavelength. The lenses are broadband antireflection coated.

• General specifications
• prices

Optical specifications

focal length		20 mm	40 mm	60 mm	80 mm	-20 mm
Art. No.		OFS 8.3.06	OFS 8.3.13	OFS 8.3.20	OFS 8.4.20	OFM 8.3.07
free aperture	[mm]	6,7	13,5	20	20	7
aperture ratio		1:3	1:3	1:3	1:4	1:3
mount diameter	[mm]	19	25	25	25	25
mount length	[mm]	31,0	20,65	17,5	16,5	17,5
connection thread		RMS	RMS	-	-	-

Chromatic Focal Shift

The graph shows the typical relative spectral shift of the focal length referenced to the nominal focal length f for objectives of this series. To calculate the shift in length units for a certain objective the values must be multiplied by the respective nominal focal length.

Prices

order no.	1 piece in €	2-5 piece in €	6-10 piece in €
OFM 8.3.07	1445.-	1301.-	1229.-
OFS 8.3.06	1445.-	1301.-	1229.-
OFS 8.3.13	1445.-	1301.-	1229.-
OFS 8.3.20	1445.-	1301.-	1229.-
OFS 8.4.20	1445.-	1301.-	1229.-