The trademark FACTORY OPTICAL is used under agreement with Factory Optical (1980) Ltd. and is limited to use by this Company in the Province of Saskatchewan. Affiliate operations to this Company trade as Optiks International outside the Province of Saskatchewan.

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These Sorbothane mounting feet provide a passive isolation solution for workbench-mounted breadboards, effectively isolating noisy equipment from the optical table or breadboard surface. Unlike our pneumatic benchtop isolation solutions, these solid Sorbothane feet do not require inflation.

We recognize that no two customers are the same, so we give you options when it comes to how you purchases your lens coatings! You can purchase the coatings a-la-carte or through one of our discounted packages.

The tables below show the different sizes that a Sorbothane sheet should be cut down to for isolating certain frequencies. Within each table are minimum frequency values, meaning that at a specific size and load the isolator will effectively damp any frequency equal to or greater than what is given. Orange cells indicate areas where the specific isolator size and load should not be used. N/A indicates that the load is too great, whereas >100 Hz indicates that a better option is available (i.e., to isolate a frequency of 150 Hz, an isolator size that is effective from 50 Hz and up is a better choice than one that is effective from 100 Hz and up).

Polarized Lenses – Turn any pair of glasses into sunglasses! This is our most popular sunglass lens. This tinted lens is very effective at blocking reflections off ice and water which enhance our visual comfort while spending days at the beach, driving, and for many sports.

Please note that these feet may have silicon residue on their surface from the molding process. To remove the residue, wipe the feet down with an alcohol-based solvent such as isopropyl alcohol (IPA). To protect the work surface from this residue, please see our SB12E Adhesive Felt Sheets below.

Anti-Reflective Lenses - Look better, see better! Anti-reflective lenses improve the appearance and performance of your lenses by allowing more light to pass through them while reducing glare. This will help make your lenses look invisible.

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Thorlabs’ Sorbothane Feet and Sheets offer excellent vibration and acoustic isolation for laboratory needs. Our Sorbothane feet offer internal 1/4"-20 (M6) threads or an adhesive surface, which can be used to attach the feet to the bases of test equipment or breadboards. For a more versatile option, Thorlabs also offers 12" × 12" (305 mm x 305 mm) Sorbothane sheets with 1/8" (3.2 mm), 1/4" (6.4 mm), or 1/2" (12.7 mm) thickness. These sheets are easily cut and can be adapted to suit a variety of custom applications.

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Progressive – Progressive lenses are for individuals who need both distance and reading correction. Compared to bifocal and multifocal lenses, progressives gradually adjust, providing sharper overall vision and seamless transitions between distance corrections. We also offer traditional bifocal and trifocal lenses.

We offer the latest in lens manufacturing technology. Our Freeform digitally manufactured lenses are capable of increasing our peripheral vision at all distances - reducing head turning while driving, making reading easier, and reducing mid-range eyestrain. By surfacing the prescription on the inside curve of the lens as opposed to the outside as is the case in non-digital lens product, the gain in proximity to our eye greatly enhances visual acuity.

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Occupational - Occupational or “office lenses” are customized for the individual’s work environment. We have a lens designed for the active office worker. These lenses are deliberately designed to enhance your near and mid-range vision for your desk work, while allowing you to roam the office without changing glasses. We also offer a lens for the cubicle worker that seldom leave their desks.

Based on the values given above, the calculated load per isolator is 13.5 lbs. This value should then be looked up on each isolation graph for the round isolator feet below. Sorbothane feet with a calculated load per isolator that exceeds the maximum load are not suitable for the application. Without a known problem frequency, the isolator that effectively isolates at the lowest cut-on frequency is recommended.

These pliable Sorbothane Sheets are ideal for isolating mechanical noise or vibrations. The sheets come in three thicknesses and can be placed under a breadboard in single or stacked layers to counter the effects of uneven work surfaces or to isolate the breadboard from vibrations. For objects over 5 lbs (approx. 2.2 kg), the thicker 1/4" (SB12B) or 1/2" (SB12C) sheets are recommended. For information on the isolation efficiency of these sheets at specific load capacities, please see the Sheet Cutting Guide tab above.

The round sorbothane feet's isolation graphs, shown below, use load per isolator (m) in lbs, which is given by the following equation:

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If a sorbothane sheet is preferred, it would need to be cut to an appropriate size as shown in the Sheet Cutting Guide tab. For a 13.5 lb (6.1 kg) load, a 0.5" (12.7 mm) thick sheet cut into 1.5" x 0.5" (38.1 mm x 12.7 mm) pieces would provide a good isolation solution.

Transitions™ Lenses – Transitions™ lenses are clear lenses that change colour automatically when exposed to sunlight. They are excellent filters of harmful UV light and are available in several colours and intensities.

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These Adhesive Sheets are designed to be used with our Sorbothane mounting feet or sheets. The SB12D sheet, which has two adhesive surfaces, is ideal for semi-permanent applications where the sorbothane surface will not have to be moved often. Our SB12E sheet, which has one adhesive and one felt surface, prevents the sorbothane from marking or marring the table surface that they are placed on.

For this example, the AV4(/M) or AV5(/M) sorbothane feet would both be acceptable solutions. The AV4 Ø27 mm isolator feet provide better isolation performance at lower frequencies but are near the load limit, so if the total load were higher than anticipated the isolator would be outside of the recommended load capacity. Our AV5 Ø38.1 mm isolator feet will have worse isolation performance at lower frequencies, but are well within the load range which may be preferable.

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Scratch-Resistant Lenses – Scratch-Resistant coatings help to protect your lenses from minor micro-scratches caused by normal use of your glasses and will help extend the life of your lenses.

Blue Light Filters – Though the science behind HEV blue light is still evolving, some customers experience reduced eyestrain and improved sleep patterns when wearing these filters.

Anti-fatigue – Anti-fatigue lenses reduce eyestrain at all visual distances by enhancing our vision for hand held devices like cell phones and tablets as well as our computers and laptops.

These sheets are sized to fit directly under our 12" x 12" (305 mm x 305 mm) sorbothane sheets, but can also be cut down to fit under our sorbothane mounting feet.

The AV4(/M), AV5(/M), and AV6(/M) mounting feet each contain internal 1/4"-20 (M6) threading and include four 1/4"-20 (M6) threaded setscrews. In contrast, the AV3 mounting feet are not threaded, and are attached to equipment or breadboards using the included double-sided tape. See the table below for the load capacities and dimensions of each isolator. When choosing an isolator, we recommend picking the isolator that offers the largest range of damped frequencies for the specific load being used. For further assistance in choosing the proper sorbothane isolator, please see the Feet Selection Guide tab above.

The example presented here details the steps needed to ensure the proper selection of round sorbothane isolator feet to match the requirements of a particular load and problem frequency. Following the example are plots showing the amount of isolation achieved for our isolator feet. For specific isolation recommendations, please contact Tech Support.

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For assistance in choosing the proper sorbothane isolator, please see the Feet Selection Guide and Sheet Cutting Guide tabs above.

Single Vision – Single vision lenses are for individuals who have trouble seeing objects at one distance – either up close or far away.

Sorbothane sheets can be cut to size using scissors or a utility knife. Please contact Technical Support to request Sorbothane sheets with a lower hardness.