Opto Sigma

We offer three and five-axis optical mount baseplates and inserts. These optional baseplates are offered to provide convenient slotted hole mounting configurations. Various inserts are offered to accommodate 10mm, 30mm, 1.5 inch optics and microscope objectives.

• Designed for use mini optical fiber holders
• Used to secure a small optical fiber holder to a stage or holder
• Offered in three versions to suit your application

• Adjustable bar with separate clamp holds lenses securely

• Accepts a range of diameter lenses

• Both spherical and cylindrical lens types

The adjustable bar type of lens holder has been in common use for a long time. These holders have vee grooves in both the base and the bar to hold the lens more positively. There is a separate clamp which makes it easy to apply the correct pressure to the lens after loosely positioning the bar in place. Each size accepts a range of lenses. The spherical lens type is intended for holding circular lenses, while the cylindrical lens type is more suitable for rectangular shape lenses.

• Mechanical slit jaws held precisely in line
• Slit width continuously adjustable
• Calibrated drive
• Slit length adjustable from 0 to 24mm

Baseplates are available for 3 and 5-Axis optical mounts. These optional Baseplates are offered to provide convenient slotted-hole mounting configurations.

• Absorb laser beams while not in use
• Block unwanted beams
• Two sizes cover most laser types

Laser beams passing into the aperture of these beam dumps are quickly dissipated and absorbed within the body of the dump. A ribbed conical design ensures that incident laser energy will not emerge to interfere with wanted parts of the beam or to cause inadvertent damage. Two sizes, 10mm and 52mm cover most laser beam sizes. The bases are threaded 8-32 or M4 for attachment to posts or pedestals.

• Easy removal and replacement of lenses
• Range of diameters accommodated
• Two New sizes to accommodate 30-50mm and 40-110mm optics

Precision caliper lens holders are ideal for experimental and prototype situations where lenses of different diameters need to be removed and replaced frequently. Simply squeeze the two protruding pins together to open the calipers. Hold the lens in position and gently release the pins. The lens will be securely held in position until you wish to remove it. The clamp on the side permits the calipers to be held open, if required.

• Holders for mounting and adjusting FC and SMA type optical fibers
• Standard with FC or SMA connectors and receptacles
• All adjust screws have a 2mm stroke
• Two versions offer vertical and horizontal fine motion movement perpendicular to optical axis
• Two versions offer two directions of tilt, vertical horizontal fine-motion movement perpendicular to optical axis
• Two versions have small differential micrometer to provide 0.5mm coarse-motion and 0.05 fine-motion

• Holders for mounting and adjusting FC and SMA type optical fibers
• Standard with FC or SMA connectors and receptacles
• All adjust screws have a 2mm stroke
• Two versions offer vertical and horizontal fine motion movement perpendicular to optical axis
• Two versions offer two directions of tilt, vertical horizontal fine-motion movement perpendicular to optical axis
• Two versions have small differential micrometer to provide 0.5mm coarse-motion and 0.05 fine-motion

• Lockable 3-axis positioning
• High resolution 100-pitch adjustment screws
• Optional fiber chuck configuration
• Post or base mounting options available

The 3-axis fiber optic mount and fiber optic holders are useful in many applications for alignment of fibers. When aligning fibers it is important that the user has the ability to adjust accurately to the required position and then lock in place. Our fiber optic mount has 100 threads per inch adjustment screws that provide smooth accurate motion during the alignment process. The lockable X and Y-axis minimizes the need for constant readjustment.

• Spring clip and clamp type
• For single and multiple filters
• For filters from 1inch to 80mm

These simple holders can be used to hold filters, diffusers, glass plates or any flat component. They do not have any adjustment capability. The spring clip-type is best if you need to remove or change the filter frequently and is most suitable for round filters. This type is offered for single filters and as a stack to hold up to four filters. The clamp-type is better for permanent applications and for square filters. It is only offered for single filters. The base of the holders are threaded 8-32 or M4 for inch or metric post or pedestal base mounting.

• Convenient mount holds up to 12 filters
• Detent indexing for fast positioning
• Double and single wheels for improved versatility

Our new indexed filter wheels may be used to position a selection of filters. Each filter wheel holds six, 1 inch (25mm) filters and is mechanically indexed with detents for ease of adjustment. The 2-wheel version will hold as many as 12 filters and the 1-wheel version will hold up to 6 filters. These filter wheels may also be purchased complete as a neutral density filter set.

• Lockable 5-axis optical positioning
• True gimbal tip/tilt adjustments
• Optional baseplates for slotted hole mounting

For the ultimate in five-axis positioning of lenses and other optics, our five-axis optical positioners provide stable XYZ and gimbaled azimuth and elevation adjustment. The innovative design yields true gimbal positioning about two orthogonal coplanar axes. The five independent axes allow you to control the positioning an optic in any plane along any axis.

Translation in X, Y, azimuth and elevation is accomplished with a high resolution 100-pitch thumb screw. Positioning along the optical axis or Z direction is non-rotational by use of a zoom lever attached to the mount housing. The positioning mechanisms in all three linear axes are lockable to secure your optics position once alignment has been achieved.

We offer five-axis mounts to hold 1/2 inch, 1 inch and 2 inch optics. In addition, adapters may be purchased to mount optics of different diameters. All mounts have inch or metric threaded holes on the bottom to accommodate our post and post holder mounting system. Optional baseplates are offered to provide convenient slotted hole mounting configurations.

• Ring mounts for most standard lens diameters
• May be post or pedestal mounted
• Marked with lens diameter

Most common lens diameters of thickness between 1 and 9mm can be mounted in these fixed rings. The lens is secured by means of a retainer and nylon washer. The base of the lens holder is threaded 8-32 or M4 for inch or metric post mounting.

Also offered is a microscope objective holder which has an RMS thread diameter 20mm, pitch 0.7mm for direct attachment of microscope objectives. This holder does not have a retaining ring. A selection of microscope objectives are also offered.

We offer a complete line of fixed lens holders for our multi-element lens product lines. These holders are designed for use with our Excimer Laser Focusing Lenses, High-Power Air-Spaced Laser Achromats, Ultra-violet Achromats and YAG Laser Focusing Lenses.

• Holders with fine adjustment for mounting optical fiber
• FC-type optical fiber fine motion holder combined with a small optical fiber holder adapter
• Products are offered with small differential micrometer to provide 0.5mm coarse motion and 0.05 fine-motion
• The standard product is offered with holder suitable for jacket diameter of 900μm the 250 and 500μm holders are also available upon request
• Holders also available with rotation when polarization adjustment is required and for mounting objective lens for focusing a laser beam to a FC-type optical fiber

• Mechanical shutter used to open and close the laser beam optical path
• Selectable shutter speeds, T, B, 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500
• With T, selected the shutter opens when the release is pressed and closes when the release is pressed again
• With B, selected the shutter opens when the release is held down
• Aperture diameter 24mm maximum and 1.5mm minimum

• Designed to separately secure clad and jacketed fiber using V-groves and magnet
• There are three diameter versions, 250, 500 and 900μm to hold standard jacketed fiber sizes
• The V-groove for the cald fiber will secure diameters from 60 to 250μm
• The holders are designed to be used in combination with the Mini-Fiber adapters

• Suitable for 10 to 20mm filters
• Rod mounted

A mini-filter holder is offered here. It consists of a double clamp mounted on a rod. Filters may be mounted on either side of the rod simply by releasing the spring loaded clamp against the filter. This method is quite secure for filters which rarely need any critical positioning.

A mini-iris holder is offered complete with the iris installed. It can be supplied either rod or base mounted. A clampable lever at the top can be rotated through 90 degrees to alter the iris aperture continuously from 1 to 12mm. The iris has hardened and blackened leaves.

• Holds lens securely in place
• Permits X-Y adjustment of the optical axis
• To suit 10mm and 15mm or 5-15mm lenses

Mini-lens holders are offered for 10mm and 15mm diameter lenses. They have a centering adjustment capability which is driven by two screws protruding from the top and side of the mount. Lenses are retained by a screw ring. There is also a spring loaded adjustable holder which covers a range from 5 to 15mm diameter and does not have any centering capability.

Mini-polarizer holders are available for 10mm and 15mm diameter polarizers. These incorporate a 360 degree clampable rotation facility. The polarizers are held in place by a retaining ring.

• Tip/tilt and rotation adjustment
• Prism clamp included
• Suitable for up to 10mm cubes and prisms

A mini-prism table is available for prisms up to 10mm side. These are held by a clamp on the top of the table and can be adjusted over two axes of tilt. Additionally there is a fine adjustment of rotation by means of a lead screw. The mini-prism table is base mounted.

Spacers to take up height differences. 25mm square with M2 clearance holes on 20mm square pattern. 5, 10 and 15mm thick. Black anodized aluminum.

• Pre-selected mini-system kits
• With and without rails
• Supplied in a convenient carrying case

This system facilitates close stacking of components and the building of small scale optical systems assemblies. Holders are offered for 10mm and 15mm optics since these sizes lend themselves most effectively to diode and fiber systems. A system of mounts and rails permits the movement of components relative to each other.

The standard system is based on a metric hole pattern of M2 threaded holes on 10mm centers. This system provides for closer spacing than is possible with inch based systems. Metric screws, tools and adapters are offered here for use with the system.

The baseplates have a pattern of M2 holes but they also contain large clearance holes for mounting onto conventional larger scale inch or metric opto-mechanical systems. These mounting holes are clearance counter-bored for a 1/4-20 or M6 cap screw.

The mini-system is usually assembled on a baseplate of appropriate size. We offer a standard range of mini-baseplates which are suitable for most applications. The mounts can be assembled directly onto the mini-baseplate or by means of an optical mini-rail system. The mini-rails permit variations in the spacing of components for coarse adjustment. Component holders are mounted either directly on the mini-rail carriers or on mini-posts. Mini-stages or mini-preset stages (described on pages 298 and 349) can be interspersed in order to provide precise mechanical positioning. The entire system is based on a 30mm center height which can be increased in 10mm increments. Spacers of 5, 10 or 15mm thickness can be supplied in order to maintain the correct center height. This compensation may be necessary, for example, when some components are missing.

You will find that this mini-system provides all the mechanical adjustment capabilities you require in a simple and compact system. The unique design permits easy access to the components without a complicated set of supports.

We offer these mini-system kits in order to simplify the selection of components. Each kit has a complete range of minisystem products ready for use. One kit has only base mounted components while the other has both bases and rails. Both are supplied in a convenient carrying case with cut-out foam to hold the items in place.

If you wish to specify your own components or add to the kit, you can select individual items from the pages referenced in the table below. The carrying case is also offered separately if you wish to make up your own kit.

Mini-washers are used to allow the mounting of the larger clearance holes and M6 to M4 mounting holes. The washers have top-hat structure that assures a precise location of the screws.

• Continuously adjustable aperture stops
• Aperture calibrated in millimeters
• Lockable at any position
• 8, 12, 15, 22, 36 and 50mm sizes

Irises provide the simplest means of controlling the aperture of an optical system. These iris diaphragms are mounted in housings and calibrated in terms of aperture diameter in millimeters. The aperture may be continuously adjusted and then locked in position by means of the clamp screw. Three sizes cover the majority of beam sizes in common use.

• Standard to high precision drive versions
• A wide selection of mounted pinholes offered
• Suitable for post mounting

Pinholes are an important part of any laser system. They must be accurately positioned in both X and Y directions. The simple version uses a plain bearing and fine pitched push screws. It is suitable for most general purpose applications. The precision version utilizes an X-Y ball bearing stage with precision micrometer drives. The high precision version uses a differential micrometer to provide sensitivity of 0.0025mm. Both mounts will accept any pinhole which is mounted on a 16mm diameter disc. The disc is held in place by a retainer ring. The edges of the pinhole mounts are threaded 8-32 or M4 for attachment to a standard mounting post or pedestal.

• Hold most types of polarizers securely
• Permit 360 degree rotation about the optical axis
• Micrometer version provides high sensitivity
• Lockable
• Range of adapters for Glan polarizers

The most common requirement for polarizers is to rotate them about the optical axis. Sometimes it is only necessary to set them at the correct orientation but in some applications it is necessary to rotate the polarizer during use.

Our polarizer holders are available in two configurations. Micrometer driven polarizer holders offer high precision adjustment for the most demanding polarization rotation applications. The micrometer drive version provides continuous 360 degree coarse adjustment and 10 degrees of fine micrometer adjustment. Lever type polarizer rotators are suitable for less precise applications. Simply grasp the lever protruding from the side of the holder to rotate and set the polarizer angle, while maintaining the axis on the optical centerline. Once in place the angle can be locked by using the clamp screw.

Both types of holders are offered for 20, 30 and 50mm diameter polarizers or waveplates. Adapters are available for most common mica and calcite polarizers. The base of the holders are threaded 8-32 or M4 for use with our post and post holder or pedestal base mounting systems.

Adapters are available for most common mica and calcite polarizers.

• Holders with fine adjustment for mounting optical fiber
• FC-type optical fiber fine motion holder combined with a small optical fiber holder adapter
• Products are offered with small differential micrometer to provide 0.5mm coarse motion and 0.05 fine-motion
• The standard product is offered with holder suitable for jacket diameter of 900μm the 250 and 500μm holders are also available upon request
• Holders also available with rotation when polarization adjustment is required and for mounting objective lens for focusing a laser beam to a FC-type optical fiber

• Holders with fine adjustment for mounting optical fiber
• FC-type optical fiber fine motion holder combined with a small optical fiber holder adapter
• Products are offered with small differential micrometer to provide 0.5mm coarse motion and 0.05 fine-motion
• The standard product is offered with holder suitable for jacket diameter of 900μm the 250 and 500μm holders are also available upon request
• Holders also available with rotation when polarization adjustment is required and for mounting objective lens for focusing a laser beam to a FC-type optical fiber

• Tip-tilt adjustment built in
• 2-axis and 3-axis versions
• Prism clamps included
• Can be post mounted
• Three sizes cover most commonly used prisms

Prisms and cube beamsplitters need to be openly mounted so that the entrance and exit beams can pass unimpeded. These prism tables provide a flat surface with either two or three axes of tilt adjustment built in. The prism can be placed on top of the table and secured by means of a spring clamp. Thumb-wheels protruding from the side of the table are used to adjust the tilt of the table over a range of 4 degrees. The third-axis, when present, is adjusted over a range of 6 degrees by means of a knob protruding from the side.

The base of the tables are threaded 8-32 or M4 for inch or metric post mounting. Alternatively, they can be mounted directly onto a base plate or a stage by using the two clearance holes provided.

• Simple to align and hold
• For most common size retro-reflectors
• Can be post or direct mounted

Retro-reflectors are some of the most difficult components to support and align. With the face perpendicular to the optical axis there is no clear reference surface. These holders make it simple to hold and align retro-reflectors. Once mounted in these rings they may be treated like any other component. Individual holders are offered for each of the most common diameters. The base of the holders are threaded 8-32 or M4 for inch or metric post or pedestal base mounting.

• Spring loaded arm holds optic in place and enables quick and easy mounting
• Small lens holders for 5 to 10mm diameters
• Mini lens holder for 1.5 to 3mm diameters
• Adapters for mounting with rods and holders

• Precise X-Y-Z alignment
• Accepts a range of pinholes and microscope objectives
• Slotted base for mounting onto optical breadboards

In order to transmit only the fundamental Gaussian output of a laser it is common practice to spatially filter the beam. The beam is focused onto a pinhole and then allowed to diverge or be recollimated. This spatial filter has built in X, Y motion on the pinhole mount and Z motion on the focusing objective. Pinholes in 16mm mounts are accepted as well as all standard microscope objectives. These must be ordered separately. The base has two slots for 1/4-20 or M6 screws which permit mounting onto a base with two inch or 50mm separation of mounting holes.

• Lockable 3-axis optical positioning
• High resolution 100-pitch adjustment screws
• Optional baseplates for slotted hole mounting

For the ultimate in three-axis positioning of lenses and other optics, our three-axis optical positioners provide stable XYZ adjustment. The three independent axes allow you to control the positioning an optic in any plane along each orthogonal axis.

XY translation is accomplished with a high resolution 100-pitch thumb screw. Positioning along the optical axis or Z direction is non-rotational by use of a zoom lever attached to the mount housing. The positioning mechanisms in all three linear axes are lockable to secure your optics position once alignment has been achieved.

We offer three-axis mounts to hold 1/2 inch, 1 inch and 2 inch optics. In addition, adapters may be purchased to mount optics of different diameters. All mounts have inch or metric threaded holes on the bottom to accommodate our post and post holder mounting system. Optional baseplates are offered to provide convenient slotted hole mounting configurations.

• Convenient for adjustment of beam intensity
• Optical density from 0.4 - 2.7
• 2-inch and 4-inch diameters
• May be post mounted

Neutral density filter wheels are convenient tools for the adjustment of beam intensity. They can be mounted in an optical path and rotated to increase or decrease the beam attenuation. Since the filter coating is neutral over the visible spectrum no change of spectral content will occur. The filters have a 0.04 - 2.7 variation in optical density over 330 degrees of rotation so they can be used to balance signal strength over a wide dynamic range (10,000:1). The outer metal ring is grasped and rotated by hand to set the density level. A clamp screw enables the rotation to be locked at any point. The central boss has three different threaded holes (8-32, M4 and M6) to accommodate post or pedestal mounting for both inch and metric mounting systems. Two types of discs are offered - BK7 and synthetic fused silica. The two sizes offered cover most applications.

• Holds lenses securely in place
• Permits X-Y adjustment of the optical axis
• To suit 20mm, 1inch, 30mm and 2-inch lenses

Lenses may be mounted directly into these holders by means of the retaining ring provided. The optical axis is easily adjusted in two axes by means of the fine pitch, 50TPI (0.5mm) adjusting screws which protrude from the side of the holder. These adjusters operate against a springloaded plunger which will retain the lens in position, once set. The holders may be attached to a post or pedestal base by means of an 8-32 or M4 screw.