Modular Condensers for the Olympus BH2 Series
BH2-CD Condenser
The BH2-CD condenser is a standard oil-immersion Abbe condenser, with a maximum numerical aperture of 1.25 and a focal length of 13.4mm. This condenser is comprised of two elements in two groups, and is best suited for usage with the E, A, DPlan, and SPlan objectives. The field coverage of the BH2-CD is suitable for usage with 10X through 100x SPlan objectives or 4x through 100x E, A, or DPlan objectives.
BH2-AAC Condenser
The BH2-AAC condenser is an aplanatic achromatic oil-immersion condenser, comprised of seven elements in four groups. The BH2-AAC has a maximum numerical aperture of 1.40 and a focal length of 9mm. With a design that provides optical corrections above a standard Abbe condenser, the BH2-AAC provides optimal imaging for high-performance fluorite and apochromatic objectives. The field coverage of the BH2-AAC is suitable for usage with 10X through 100X SPlan objectives.
BH2-PC and BH2-PCD Condensers
The BH2-PC and BH2-PCD are oil-immersion, Zernike-style phase contrast condensers. The BH2-PC and BH2-PCD feature standard Abbe optics, with a maximum numerical aperture of 1.25. The BH2-PC contains phase annuli for 10x, 20x, 40x, and 100x phase contrast objectives, as well as a normal bright-field setting. The BH2-PCD omits the 20x annulus, to allow for the inclusion of a simple low-power darkfield stop. The BH2-PC is recommended over the BH2-PCD. Why hobble your phase contrast capabilities for a simple darkfield stop, when a darkfield stop can be easily added to the BH2-CD condenser?
BH2-ULC Condenser
The BH2-ULC is a condenser suitable for usage with low-power objectives. The BH2-ULC has a maximum numerical aperture of 0.16 and a focal length of 67.4mm. This condenser is comprised of three elements in three groups and provides field coverage for 1x through 4x objectives.
BH2-LWCD Condenser
The BH2-LWCD is a long working distance condenser suitable for usage with the NHS-SIC Large Mechanical Stage. This condenser has a maximum numerical aperture of 0.65.
BH2-UCD Condenser
The BH2-UCD is a dry, aplanatic achromatic “universal” condenser which supports brightfield, darkfield, phase contrast, polarizing, or Nomarski NIC, via easily replaced optical inserts. The BH2-UCD contains a “swingable” top element. which provides a maximum numerical aperture of 0.9, a focal length of 13.1mm, and sufficient field coverage for objectives down to 2x, when swung out of the optical path, and a maximum numerical aperture of 0.2, a focal length of 229mm, and sufficient field coverage for objectives up to 100x, when swung into the optical path. The BH2-UCD has a working distance of 1.5mm (with a 1.2mm slide), and an illumination diameter of 3mm (top lens “in”) and 14mm (top lens “out”). The BH2-UCD contains an integral linear polarizer, which can be rotated through the full 360 degree range. With the proper optical elements installed (5 slots available), the BH2-UCD will support 10x, 20x, 40x, 60x, and 100 x phase contrast, 10x, 20x, 40x, 60x, and 100x Nomarski, and 10x and 20x darkfield. The iris diaphragm functions as the field diaphragm (for Kohler), when the top lens is swung out for low-power operation. To prevent damage to the condenser, the BH2-UCD must never be used with oil immersion to the slide.
BH2-NIC Condenser
The BH2-NIC is an oil-immersion, aplanatic / achromatic Zernike-style condenser, which supports brightfield, phase contrast, and Nomarski NIC microscopy. The BH2-NIC has a maximum numerical aperture of 1.40, with a rotatable sliding polarizer and an adjustable iris diaphragm. Four internal modified Wollaston prisms are included for 10x, 20x, 40x, and 100x NIC, as well as two centerable phase annuli, for 10x and 40x phase contrast. A brightfield position is also included. In order to achieve Nomarski imaging, the BH2-NIC must be used with the BH2-NA Nomarski intermediate tube (which has a 1.25x magnification) as well as appropriate NIC-compatible objectives.
BH2-DCD Condenser
The BH2-DCD condenser is a dry darkfield condenser with a numerical aperture of 0.92 – 0.8 and a focal length of 11.8mm. The BH2-DCD is comprised of one element in one group, and is suitable for usage with low-power objectives from 10x through 40x. To prevent damage to the condenser, the BH2-DCD must never be used with oil immersion to the slide.
BH2-DCW Condenser
The BH2-DCW condenser is an oil immersion darkfield condenser suitable for usage with higher-power objectives from 10x through 100x. The numerical aperture of the BH2-DCW is 1.4 – 1.2. The BH2-DCW is comprised of two elements in one group and has a focal length of 7.65mm. This condenser must always be oil-immersed to the bottom surface of the slide, or you will see no light in the field of view. When used for100x darkfield, the 100x objective must contain an integral iris diaphragm, to allow the numerical aperture to be reduced below 1.2.
BH2-POC Condenser
The BH2-POC is a dry polarizing condenser intended for usage on the BHTP or BHSP polarizing microscopes in the BH-2 family. Like the BH2-SC condenser, the BH2-POC has a maximum numerical aperture of 0.9, and contains a “swingable” top element, which may be swung into or out of the optical path, as desired. When the top element is swing into the optical path, the field coverage of the BH2-POC is suitable for usage with 10x through 100x objectives. When the top element is swung out of the optical path, the field coverage is suitable for usage with 2x through 10x objectives (at a reduced numerical aperture). The BH2-POC contains an integral linear polarizer which can be rotated the full 360 degree range. The BH2-POC may be used for non-polarizing applications, but be aware that the integral linear polarizer will impose a full stop (i.e., 50%) light loss. To prevent damage to the condenser, the BH2-POC must never be used with oil immersion to the slide.
BH2-SC Condenser
The BH2-SC is a dry condenser with a maximum numerical aperture of 0.9 and a focal length of 12mm. This condenser contains four elements in three groups, and includes a “swingable” top element, which may be swung into or out of the optical path, as desired. When the top element is swing into the optical path, the field coverage of the BH2-POC is suitable for usage with 10x through 100x objectives. When the top element is swung out of the optical path, the field coverage is suitable for usage with 2x through 10x objectives (at reduced numerical aperture). To prevent damage to the condenser, the BH2-SC must never be used with oil immersion to the slide.