The ‘M’-series of Newport objectives are essentially conventional microscope objectives that have been requantified in terms of their performance as imaging elements in spatial filters. They are high-quality achromats of short adjustment length (37mm), with standard RMS mounting threads. They are anti-reflection coated for the visible region of the spectrum, and corrected for an optimal 160mm rear conjugate.

� Magnification – 10x
� Numerical Aperture – 0.25
� Wavelength range – 400 to 700nm
� Working distance – 5.5mm
� Input Beam Diameter – 5.5mm
� Optimal Pinhole Diameter – 25 um

The objective is in excellent condition without any optical flaws. They may be used as conventional microscope objectives in 160mm tube length instruments.

Photo set 1481
***MPN M-10x
***OEM Newport Research Corp (NRC)
***SKU*** 21510

This is a conventional meidum magnification dry achromat microscope objective. It is not marked as to cover-glass correction, nor as anything specified on the Rolyn Optics web site. However, the numerical aperture is low enough that the presence or absence of a cover slip is inconsequential.

� Magnification – 10
� Numerical Aperture – 0.30
� Objective thread – standard RMS (0.8 inch)
� Tube length – 160mm
� Adjustment length – 37mm
� Working distance – 5.5mm
� Manufacturer – Rolyn Optics
� Catalog number – 80-3055

The objective is in superb cosmetic condition. Optical condition is perfect. Most of these lenses have a yellow band to denote magnification, however a couple of the lenses have a purple band instead. Otherwise the lenses appear to be absolutely identical.

Photo set 1480
***MPN 80-3055
***OEM Rolyn Optics Co
***SKU*** 21509

This is a conventional meidum magnification dry achromat microscope objective. It is not marked as to cover-glass correction, nor as anything specified on the Rolyn Optics web site. It performed well with a nominal 0.17mm cover slip, but was not tested with an uncovered sample.

� Magnification – 20
� Numerical Aperture – 0.50
� Objective thread – standard RMS (0.8 inch)
� Tube length – 160mm
� Adjustment length – 37mm
� Working distance 1.56mm
� Manufacturer – Rolyn Optics
� Catalog nuber – 80-3080

The objective is in superb cosmetic condition. Optical condition is perfect.

Photo set 1479
***MPN 80-3080
***OEM Rolyn Optics Co
***SKU*** 21508

This is a conventional low magnification achromat microscope objective. It is useful for scanning larger areas of samples, and features a relatively long working distance. One unusual feature of this objective is the removable protective cover glass in a chrome threaded cell. An additional 2mm or so of working distance can be achieved when this cover has been unthreaded. Other lens characteristics remain essentially unchanged.

� Magnification 3.5
� Numerical Aperture – 0.10
� Objective thread – standard RMS (0.8 inch)
� Tube length – 160mm
� Adjustment length – 37mm
� Working distance (cap installed) – 19mm
� Manufactured in Germany by Rolyn Optics
� Catalog number – 80-3035

The objective is in near-new condition and comes in a protective capsule. Optical condition is perfect.

Photo set 1476
***MPN 80-3035
***OEM Rolyn Optics Co
***SKU*** 21505

The Gaertner Scientific M300PA micrometer slide has one inch of travel. The carriage is threaded to accept the standard Gaertner measuring microscopes and telemicroscopes. The carriage ways are precision hand-scraped, and the leadscrew is hand-lapped to the nut. There is a special cam that tilts the nut as the carriage is positioned, thereby correcting any residual errors in the pitch of the lead screw.

There is a one inch scale to indicate the coarse position of the carriage, and a precision graduated drum to indicate the fine position directly to 0.0005 inches, and to 0.0001 inches via the vernier. This version of the slide is not equipped with the 19mm post, instead it is meant to be mounded on the face opposite the drum. However, the slide is finished and tapped to accept the threaded post. See the third photo.

The slide is in superb condition, and has been cleaned and relubricated.

Photo set 1378

BMI Surplus, Inc. is your best resource for microscopes and microscope components. We will work with you individually to find the perfect microscope for your application. For the most competitive pricing contact us by phone or click the purple �Ask us a question�� link above. We look forward to working with you!
***MPN M300PA
***OEM Gaertner Scientific
***SKU*** 21407

The Gaertner Scientific M300PA micrometer slide has one inch of travel. The carriage is threaded to accept the standard Gaertner measuring microscopes and telemicroscopes. The carriage ways are precision hand-scraped, and the leadscrew is hand-lapped to the nut. There is a special cam that tilts the nut as the carriage is positioned, thereby correcting any residual errors in the pitch of the lead screw.

There is a one inch scale to indicate the coarse position of the carriage, and a precision graduated drum to indicate the fine position directly to 0.0005 inches, and to 0.0001 inches via the vernier. This version of the slide is not equipped with the 19mm post, instead it is meant to be mounded on the face opposite the drum. See the third photo.

The slide is in superb condition, and has been cleaned and relubricated.

Photo set 1377

BMI Surplus, Inc. is your best resource for microscopes and microscope components. We will work with you individually to find the perfect microscope for your application. For the most competitive pricing contact us by phone or click the purple �Ask us a question�� link above. We look forward to working with you!
***MPN M300PA
***OEM Gaertner Scientific
***SKU*** 21406

This is a Gaertner Scientific 1-LM430 precision micrometer slide with four inches of travel. The carriage, which is threaded to accept the standard series of Gaertner measuring microscopes and telemicroscopes, runs on a precision lapped cylindrical rod. The advance is by means of a split nut that is hand lapped to the leadscrew. The nut floats within the carriage and a bearing attached to the nut follows a special cam that runs along the inside of the housing. This cam corrects for any residual errors in the lead screw.

There is a four inch scale on the exterior of the instrument, and a large precision graduated drum for setting the lead screw. The graduations on the drum permit setting the carriage position directly to 0.0005 inches, and to 0.00005 inches via the vernier. The leadscrew is loaded against a spherical bearing by a large coil flat spring housed within the small compartment opposite the handwheel. This permits using the slide in any orientation.

The entire instrument has been completely rebuilt and is working flawlessly. It includes a 19mm diameter rod 6 inches long. The mechanism is completely enclosed. It weighs close to 8 pounds.

Photo set 1374

BMI Surplus, Inc. is your best resource for microscopes and microscope components. We will work with you individually to find the perfect microscope for your application. For the most competitive pricing contact us by phone or click the purple �Ask us a question�� link above. We look forward to working with you!
***MPN 1-LM430
***OEM Gaertner Scientific
***SKU*** 21403