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

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***MPN 1-LM430
***OEM Gaertner Scientific
***SKU*** 21403

This Wild Drawing Tube has been tested and is not working properly – selling as parts.

Here is a very rare item. It is a drawing tube assembly (after Treffenberg) initially made for the Wild M20 compound microscope, however this tube has an interesting modification. The mounting flange for the tube fits the tube fittings on the Zeiss ‘Grayline’ instruments. The receptacle for the viewing tube has not been altered – in other words it requires a Wild style viewing tube. The modification appears to have been done at the Heerbrugg factory since the entire central prism holder has been machined with the Zeiss flange accommodation in mind. It is not possible to simply remove the Zeiss flange and replace it with the Wild flange.

The drawing tube is interposed between the viewing head and the stand. A beam-splitter in the intervening disk superimposes an image of the desktop adjacent to the microscope onto the microscope image. The magnification ratio between the microscope image and the desktop image is regulated by a sliding sleeve (with the +V and V- markings). The desktop image is focused with the chrome knurled ring on the distal end of the tube. There is a swing-out filter holder in which a neutral density filter may be placed to assist in balancing the illumination (neutral density filters are not included).

The tube has a magnification factor of 1.25x. The optics in the tube are perfect – no delamination and no blemishes in the surface. Cosmetically the tube is in excellent condition showing some minor signs of use – most notably in the uneven finish of the distal prism housing (see last photo).

Drawing tubes remain an important device in the microscopists arsenal – often they are very helpful to make drawings of highly complex subjects in which the details of interest are otherwise obscured. They are also very useful during video microscopy if you wish to superimpose some sort of readout on the image while recording some dynamic event.

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 Drawing Tube
***OEM Wild
***SKU*** 20009

This is a fluorescence filter module for the Nikon Eclipse series of epi-fluorescence microscope illuminators. The module consists of an assembly that should include an exciter, barrier, and dichroic filter. This module has only the dichroic mirror installed. The retainer clip for the barrier filter is present, as is the threaded ring for the exciter filter.

The side of the filter module is marked ‘720DCLP’ – this appears to be a Nikon product number.

The module is in excellent condition. There do not appear to be any blemishes in the dichroic mirror.

Photo set 1286

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 720DCLP
***OEM Nikon
***SKU*** 19732

Leitz (marked �Leitz Wetzlar Germany�) microscope objective for metallurgical instruments, of Plan Fluotar correction. Plan objectives are corrected to display a perfectly flat image of up to 28mm in the intermediate image plane, while Fluotar objectives represent a very high degree of color correction……

� Magnification: 20x
� Numerical Aperture: 0.45na
� Infinity corrected
� FOV Index – 28mm
� Thread size RMS
� Must be used WITHOUT cover glass
� Leica catalog number: 567 012

The objective was removed from an KLA project that was never commissioned. There are light marks on the knurling that were left by a protective shroud, since removed. The glass is flawless. This was a specially mounted version of the PL 20x for use on KLA wafer inspection stations. There is no spring-loading for sample / objective protection. As such, the objective is most suitable as a replacement lens for KLA systems, but it may also be used on any Leitz metallurgical vertical illuminator that has an RMS thread. It may also be used on the more recent systems when employing an RMS to 32mm thread adapter.

***MPN 567 012
***OEM Leitz
***SKU*** 19520

Leitz (marked �Leitz Wetzlar Germany�) microscope objective for metallurgical instruments, of NPL Fluotar correction. NPL objectives are corrected to display a perfectly flat image of up to 20mm in diameter (useable in larger field instruments with some loss of resolution at the margins of the field), while Fluotar objectives represent a very high degree of color correction.

� Magnification: 20x
� Numerical Aperture: 0.45na
� Infinity corrected
� Thread size RMS
� Must be used WITHOUT cover glass
� Leica catalog number: 569 233

The objective was removed from an unused KLA project. There are marks on the front bezel exterior that were left by a protective shroud since removed. The glass is flawless. This was a specially mounted version of the NPL 20x for use on KLA wafer inspection stations. There is no spring-loading for sample / objective protection. As such, the objective is most suitable as a replacement lens for KLA systems, but it may also be used on any Leitz metallurgical vertical illuminator that has an RMS thread. It may also be used on the more recent systems when employing an RMS to 32mm thread adapter.

***MPN 569 233
***OEM Leitz
***SKU*** 19519

Leitz (marked �Leitz Wetzlar Germany�) microscope objective for metallurgical instruments, of NPL Fluotar correction. NPL objectives are corrected to display a perfectly flat image of up to 20mm in diameter (useable in larger field instruments with some loss of resolution at the margins of the field), while Fluotar objectives represent a very high degree of color correction.

� Magnification: 20x
� Numerical Aperture: 0.45na
� Infinity corrected
� Thread size RMS
� Must be used WITHOUT cover glass
� Leica catalog number: 569 233

The objective is in new condition, and the glass is flawless. This was a specially mounted version of the NPL 20x for use on KLA wafer inspection stations. There is no spring-loading for sample / objective protection. As such, the objective is most suitable as a replacement lens for KLA systems, but it may also be used on any Leitz metallurgical vertical illuminator that has an RMS thread. It may also be used on the more recent systems when employing an RMS to 32mm thread adapter.

Photo set 1271

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 569 233
***OEM Leitz
***SKU*** 19518

This is a later production stereo microscope ocular designed for the Bausch & Lomb StereoZoom line of microscopes. They are characterized by the black anodized barrels. These oculars offer double the magnification yielded by the normal 10x oculars while maintaining the same working distance.

� 20x magnification
� Wide-field – 12mm field-of-view index
� High-eyepoint – 10.2mm
� Standard diameter (23.2mm)
� Catalog number not marked, optically similar to 31 05 63

These oculars are excellent cosmetic condition and have near-perfect glass. Photo is of typical unit

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recycled & refurbished microscopes and microscope components.
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microscope for your application.

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***MPN 20x WF
***OEM Bausch & Lomb (B&L)
***SKU*** 19029

This is the focusable version of the standard ocular as supplied with the American Optical Cycloptic series of stereo microscopes. They are not suitable for the earlier series of Greenough-style instruments.

� 10x magnification
� High-eyepoint
� Wide-field
� Focusing eyelens in helical mount
� 23.2mm standard diameter
� Catalog number 437

These eyepieces are in excellent cosmetic condition and flawless optical condition. They may be paired with the type 146 oculars. Includes reticle retaining ring (not shown).

Photo set 1228

***MPN 437
***OEM American Optical (AO)
***SKU*** 18782

This is a single 10x wide field ocular as supplied with some of the earlier American Optical stereo microscopes. I do not believe it is suitable for the older version Greenoughs because the intermediate plate is not in the correct position.

10x magnification
High-eyepoint
Wide-field
23.2mm standard diameter
Catalog number 145

These eyepieces are in excellent cosmetic condition and flawless optical condition

Photo set 1227
***MPN 145
***OEM American Optical (AO)
***SKU*** 18781

*** Please note that the lamp socket is NOT included with the transformer � it was photographed to demonstrate the working condition of the transformer. ***

This is a nice regulating 6-volt transformer as supplied for several of the vintage Wild stereo microscopes. There are two output taps on the rear of the transformer which allow one to power a pair of 15w lamps or a single 30w lamp. The transformer is continually adjustable with the power switch integral with the intensity setting knob. A pilot lamp indicates that the power is on, and there is a volt meter for repeatable settings of lamp intensity. The output is continually adjustable. It is identical in most respects with the Model MTR 16 transformer, however it was originally supplied with a two-wire line cord. That has been replaced with a three-wire cord that has been internally grounded in a similar fashion to that of the MTR 16. The transformer also lacks the tap for a 250v primary line.
Socket and bulb NOT included
Characteristics include:

Input line selector 110 / 125 / 150 / 220 V
Secondary 30 vA
50 or 60 cycle line current
Three-wire line cord internally grounded within enclosure

The transformer is in excellent and fully functional condition. Lamp output varies smoothly without any drop-outs or sudden peaks in intensity. Cosmetic condition is very good. There are a few places where the finish on the top of the transformer is blemished, and the original knob has been replaced (see photos).
***MPN MTr2
***OEM Wild Heerbrugg
***SKU*** 16361