This microscope is very modular. The central component is the drawtube with focusing mechanism. The body of the instrument is fitted with a long 1 inch diameter threaded flange which is supplied with a locking ring. The thread allows the microscope to be attached to various Gaertner instruments, such as the precisions cross slides, instrument bases with cross-support arms, among others. The rack and pinions focusing has a range of 38mm. The nominal optical tube length of the microscope is 160mm.

Eyepieces are supplied with matched eyepiece adapter tubes so the optical tube length is maintained when switching eyepieces. The tube adapters are usually fitted with spider cross lines and therefore no attempt should be made to clean them! These microscopes are all fitted with the standard M250-242 adapter tube with 90 degree spider lines. The ocular is a type M242 Ramsden 10x, also standard.

Gaertner objectives are continuously threaded over their entire length (RMS standard thread) and have a locking ring. The continuous thread allows precise adjustment of the magnification ratio of the instrument when using micrometer eyepieces or filar eyepieces. Focal length of the objectives supplied with these instruments is 48mm (Gaertner part number M224).

As outfitted, the instrument has the following characteristics:
� 23x total magnification.
� 67.1mm working distance
� 4.71mm diameter object field

An optional component, the image erecting eyepiece adapter, may be installed instead of the eyepiece adapter tube. Depending on the adapter chosen, the eyepiece angle can be either 60 degrees or 90 degrees from the microscope axis, and an erect image is obtained due to the use of a special roof prism. Due to the extended optical tube length of the prism, the above characteristics would be slightly altered. We have these adapters listed elsewhere.

These microscopes are in near-new condition. They are in perfect mechanical and optical condition. Cosmetically, they show only the slightest traces of use or shelf-wear.

Photo set 1386
***MPN M101A/M242/M224
***OEM Gaertner Scientific
***SKU*** 21415

Brunson 800 Precision Lift.
For vertical translation
The 800�s 2.825?-20 external thread fits into many of the intermediate tubes on Brunson stands.
***MPN 800
***OEM Brunson
***SKU*** 12274

Mark-Tech Laser mounting for targets and beam-splitters. Magnetic actuator needs repair. Mount is 4.25 inches wide, 5.625 inches long. Optic axis height is nominally 2.5 inches. There are large diameter super-fine pitch adjustment screws for Y and Z translation (parallel to optic axis).

Bore diameter of holder is 1.25 inches. There is a large spring-loaded bearing that engages the detents in the mirror or detector cells. The base has a switchable permanent magnet for secure clamping. There are also three mounting holes (clearance for �-20 bolts) that are concentric with the leveling pads which are fixed in place.

Mounts are in very nice condition but there is some wear in finish of the base paint. Magnetic actuator needs repair. Part number on the mount is 6412 and it is dated April 1988.

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***MPN 6412
***OEM Mark-Tech Laser, Inc.
***SKU*** DP484

This item is a Keuffel & Esser optical and metrology cradle mount. It has the standard 3.5 inch by 8 TPI thread in the base for attaching to standard tripods, dollies, and trivets. The upper side of the carrier has a dovetail four inches wide but 10 inches in length. There is a cylinder head cap screw on one end of the dovetail, and it looks like there is a position for a second such stop screw, however it is not present. The mount is in very good condition. The part number on the cradle is 71-5082. It does not seem to be a current production item � BrunsonKC does not list it in their catalog. The green texture paint would indicate the cradle was made during the 1960�s, possibly early 1970�s.

Location MB 97

Photo set 766

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***MPN 71-5082
***OEM Keuffel & Esser (K&E)
***SKU*** DP334

This item is an HP 10724A Plane Mirror. It is a component in the Hewlett-Packard Laser Interferometry Distance Measurement Apparatus. The mirror is used in conjunction with various 1.5� cube interferometer bodies. Unlike a corner-cube retroreflector, the plane mirror must be critically aligned to the interferometer. The leveling screws are not present and the special spring-loaded attachment screws are lacking. The device is also missing the label, but is otherwise in excellent condition. Mirror is flawless. Because of the missing components and the light cosmetic blemishes in the chrome finish this item has been rated as �second grade�.
2nd Grade
***MPN HP10724A
***OEM Hewlett Packard ( HP ) / Agilent
***SKU*** DP275

This is an assembly consisting of an HP 10710A Small Leveling Base on which a 45-degree fully reflecting prism has been cemented. Although the prism could have been used to deflect a beam downwards through the aperture in the base, the excess cement that covers the face of the prism adjacent to the base would preclude such use � much of the aperture is filled with cement. Therefore it was intended for use in directing a beam upwards at right-angles to the base-plate.

The prisms are very rigidly mounted. Rather than break the prisms in an effort to remove them, we have decided to offer them in the condition found. The first-surface mirror is in excellent condition, and the prisms (although exposed) have not been chipped or damaged.

Dimensions of the base are as follows.

Height = 0.5�

Width = 1.1�

Length = 1.85�

Through-bore in base = 0.5�

Prism face 20mm square

These components have been removed from various fixtures. They meet our requirements for second quality used interferometer components. All mechanical adjustments work smoothly and there are no gouges or distortions in any of the parts that would in any way impede accuracy of measurements. Cosmetically these components appear only lightly used, however I doubt the prisms can be removed without damaging the glass. No hardware is included other than the two screws used to secure the cradle to the base.

Location W7-A

Photo set 513
***MPN HP 10710A
***OEM Hewlett Packard ( HP ) / Agilent
***SKU*** DP081

This item is an HP 10556A Retroreflector in the large size (2� square) mounting format found in the earlier Hewlett-Packard Laser Interferometer Distance Measurment Apparatus. There are four countersunk holes in a 1.4� face-centered pattern. The holes are countersunk on both sides of the mounting flange. The �outside� set of countersinks are used when attaching the retroreflector to one of the 105xx series of interferometers. The �inside� set of countersinks are used to secure the corner cube to the special carrier with post (HP part number 10550B).

These components have been removed from various fixtures. They meet our requirements for first quality used interferometer components. All optical surfaces are free of blemishes and there are no gouges or distortions in any of the parts that would in any way impede accuracy of measurements. Cosmetically these components appear only lightly used, if not new. Unlike new components, however, no hardware is included. Please note that not all of the reflectors have the plastic sleeve over the cylinder.

***MPN HP 10556A
***OEM Hewlett Packard ( HP ) / Agilent
***SKU*** DP079

This is an HP 10722A Plane Mirror Converter window. It consists of a glass wedge that allows mounting a 10702A Linear Interferometer in a fixed position with a retroreflector attached to the moving component of a stage. It is a component in the Hewlett-Packard Laser Interferometer Distance Measurement Apparatus. The window is attachable to the 1.5� size interferometer bodies.

These components have been removed from various fixtures. They meet our requirements for first quality used interferometer components. All optical surfaces are free of blemishes and there are no gouges or distortions in any of the parts that would in any way impede accuracy of measurements. Cosmetically these components appear only lightly used, if not new. Unlike new components, however, no hardware is included. The only cosmetic issue with this particular window is the missing HP label with the nomenclature, hence the slightly lower price.

***MPN HP 10722A
***OEM Hewlett Packard ( HP ) / Agilent
***SKU*** DP075

This is an HP 10722A Plane Mirror Converter window. It consists of a glass wedge that allows mounting a 10702A Linear Interferometer in a fixed position with a retroreflector attached to the moving component of a stage. It is a component in the Hewlett-Packard Laser Interferometer Distance Measurement Apparatus. The window is attachable to the 1.5� size interferometer bodies.

These components have been removed from various fixtures. They meet our requirements for first quality used interferometer components. All optical surfaces are free of blemishes and there are no gouges or distortions in any of the parts that would in any way impede accuracy of measurements. Cosmetically these components appear only lightly used, if not new. Unlike new components, however, no hardware is included.

***MPN HP 10722A
***OEM Hewlett Packard ( HP ) / Agilent
***SKU*** DP074