Long Working Distance Immersion Objective

space exceeding 60mm x 60mm can be secured by immersion

WD30mm with NA0.3(immersion)!
WD40mm with NA0.6(immersion)!

Suitable for use in a light sheet microscope.
Long working distance allows for deep observation of large transparent specimens. CS03 series supports a wide range of refractive indices without a correction ring due to the unique optical design(Patent pending). CS06-10-40-154 supports a wide range of refractive indexes by adjusting the correction ring. Dedicated design for immersion provides clear image. Field curvature is corrected, so the entire field of view is in focus.

■ Refractive index

CS03 series: 3types of lenses to match the refractive index of the immersion media
　1.523-1.560
　1.500-1.536(CUBIC-R+ etc.)
　1.462-1.502(CUBIC-X2 etc.)

CS06-10-40-154: Can be used for immersion media with refractive index of 1.520-1560 by adjusting the correction ring.

■ Applications

Biomedical microscope
Fluorescense microscope
Lightsheet microscope

We also accept custom designs and productions according to the customer's desired specifications.

Specification examples

		CS03-10-33-156	CS03-10-30-152	CS03-10-25-148	CS06-10-40-154
Numerical aperture (NA)		0.3			0.6
Magnification ※１		10
Focal length		18mm
Working distance ※２		33.3mm ※３	29.7mm ※４	25.1mm ※５	40.60mm ※６
Field of view		Φ2.5mm			Φ2mm
Refractive index of immersion media (d-line)		1.523-1.560	1.500-1.536	1.462-1.502	1.520-1.560
Wavelength	Chromatic aberration and Field curvature Correction	486-656nm
Wavelength	Spherical Correction	450-750nm			486-656nm
Transmittance		See the figure below			80% and more
Correcting ring		Non			Yes
Parfocal length		113mm			145mm
Mounting thread		M25×0.75			6-φ6mm hole (PCD120mm)
Pupil position		49.5mm ※７			49mm ※８
Maximum outer diameter		φ39mm			φ106.5mm (flangeφ134mm)
Mass		460g	465g	480g	7900g
		Long working distance dipping objective(PDF, 660KB)			Super long working distance dipping objective(PDF, 285KB)

※１Using imaging lens with focal length of 180mm.
※２ Differs depends on immersion refractive index.
※３ nd=1.560 on the d-line (587.56nm)
※４ nd=1.520 on the d-line (587.56nm)
※５ nd=1.477 on the d-line (587.56nm)
※６ nd=1.540 on the d-line (587.56nm)
※７ Distance from mounting position to specimen side
※８ Distance from mounting position to specimen side