UltraLight Series, Aluminum, 25 mm (1") Thick, High Stiffness Breadboards
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UltraLight™ optical breadboards offer high strength-to-weight ratio and excellent thermal stability. These breadboards are ideal for optical setups where portability and dynamic rigidity are important. They are typically used as replacements for aluminum, steel, or granite surface plates as well as for applications demanding a totally nonmagnetic surface. | Key Specifications | Imperial
Breadboards | Metric
Breadboards |
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| Flatness | ±0.15 mm (±0.006") Over Any 0.3 m2 | | Mounting Holes | 1/4"-20 Tapped Holes on 1" Centers | M6 Tapped Holes on 25 mm Centers | | Distance From Edge to First Holes | 1.0" on All Sides | 25 mm on All Sides |
Features- 25 mm (1") Thickness
- UltraLight Breadboards are 20% Lighter than Equivalent Solid Aluminum Surface Plates
- All-Aluminum Construction Results in Excellent Thermal Stability
- Higher Rigidity than 0.5" Thick Solid Aluminum Breadboards (see Construction Tab for Details)
- Black Matte Painted Surface Reduces Reflectivity and Backscatter
- High Density Core and Internal Damping Provide Static and Dynamic Rigidity
Choosing an Optical Breadboard
When choosing an aluminum optical breadboard, stiffness is a major consideration. Thorlabs offers two levels of stiffness: high and enhanced. Although most people associate deflection under load with thickness, it is actually the stiffness of a board that determines the deflection. The higher the stiffness, the better the breadboard's ability to resist bending when a load or force is applied to it. Therefore, when a heavy load is placed in the center of a breadboard with high stiffness, the board will deflect more than it would if the same load was placed on an enhanced stiffness breadboard. This deflection can create misalignment between two components on opposite ends of the breadboard. This feature is especially important, for example, when conducting experiments that require sliding optical setups across the breadboard while maintaining a straight optical axis.
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| Finish and Construction |
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| Breadboard Thickness | 25 mm (1") | | Flatness | ±0.15 mm (±0.006") over any 0.3 m2 | | Construction | Double-Plate, Single-Honeycomb Core, Athermalized Design | | Top and Bottom Plates | Matched materials for athermalized design.
Top 6 mm thick, Bottom 3 mm thick | | Material | Aluminium | | Core | High-Density plated aluminum honeycomb | | Damping | Proprietary broadband damping | | Sides | Black laminated-aluminum sides, slightly inset | | Finish | Matte Black | | Mounting Holes | Metric Tables: M6 tapped holes not sealed, on 25 mm centers
Imperial Tables: 1/4"-20 tapped holes not sealed, on 1" centers | | Distance from Edge to First Hole | Metric Tables: 25 mm on all sides
Imperial Tables: 1.0" on all sides | | Maximum Screw Depth | 6 mm from Top Surface |
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Thorlabs UltraLight™ optical breadboards offer high strength-to-weight ratio and excellent thermal stability. These breadboards are ideal for optical setups where portability and dynamic rigidity are important. 
Click to Enlarge
Stiffness Comparison: PBG Series (Honeycomb Aluminum Breadboard) vs. MB Series (Solid Aluminum Breadboard) Deflection data was acquired for a 1" thick PBG51507 honeycomb aluminum breadboard and a 0.5" thick MB60120/M solid aluminum breadboard. The UltraLight PBG51507 breadboard measured 600 mm x 1200 mm x 25 mm with an unpackaged mass of 19.5 kg, while the MB60120/M breadboard measured 600 mm x 1200 mm x 12.5 mm with an unpackaged mass of 23 kg. As shown in the schematic to the right, each table was supported by fulcrom points that were spaced 1 m apart. Then, various loads were applied uniformly across the center of the breadboard and the amount of deflection was measured. From the data collected, a plot of Load vs. Deflection was created as shown below; from the plot, it is clear that the UltraLight PBG series of honeycomb aluminum breadboards are lighter and stiffer than our 0.5" thick MB-series of solid aluminum breadboards. The data yields two important results: - The PBG51507 honeycomb aluminum breadboard, which is 15% lighter than the MB60120/M solid aluminum breadboard, is 4.3 times stiffer
- For a given weight, the UltraLight breadboard is effectively 5.1 times stiffer than the solid aluminum breadboard
Therefore, our UltraLight series of breadboards is an excellent choice if you are looking for a light-weight breadboard with extremely good rigidity. 
Minimum Relative Breadboard Motion The UltraLightTM range incorporates a double plate, single-honeycomb design, providing excellent stiffness and dynamic rigidity. The top layer consists of a 6mm aluminum top plate. The second layer adds the main aluminum honeycomb structure and the 3mm aluminum bottom plate. The main honeycomb core is fabricated from strips of precision-formed plated aluminum, which is bonded together with a high tensile strength epoxy adhesive. Excellent Surface Flatness Breadboard flatness is critically important during many experimental setups. Lack of local flatness requires readjustment of components for height variations across the breadboard and can cause component “wobble”. Thorlabs breadboards offer unsurpassed flatness due to the high-precision aluminum plates which are specially handled to maintain superior flatness throughout the manufacturing process. A unique thermal bonding process ensures that stress is not induced during manufacture, thereby retaining the flatness of the top plate. Athermalized Design Thorlabs breadboards have matched aluminum for both the top and bottom plates. This unique athermalized design eliminates thermal bowing effects caused by temperature variations.
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| Part Number | Dimensions (L X W X H) | Unpackaged
Mass (kg) | Unpackaged
Weight (lbs) | Packaged
Mass (kg)* | Packaged
Weight (lbs)* |
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| PBG11101 | 1' x 1' x 1" | 3.00 | 7.00 | 7.00 | 15.40 | | PBG11102 | 2' x 1' x 1" | 5.00 | 11.02 | 11.00 | 24.20 | | PBG11103 | 3' x 1' x 1" | 9.00 | 20.00 | 15.03 | 33.07 | | PBG11104 | 4' x 1' x 1" | 10.00 | 22.05 | 20.04 | 44.09 | | PBG11118 | 2' x 1.5' x 1" | 7.70 | 17.00 | 16.00 | 35.20 | | PBG11105 | 2' x 2' x 1" | 9.00 | 20.00 | 20.00 | 44.00 | | PBG11106 | 3' x 2' x 1" | 13.00 | 29.00 | 29.00 | 63.80 | | PBG11107 | 4' x 2' x 1" | 20.50 | 45.00 | 34.00 | 74.80 | | PBG11108 | 5' x 2' x 1" | 24.00 | 52.91 | 37.92 | 83.60 | | PBG11110 | 3' x 2.5' x 1" | 16.00 | 35.00 | 33.00 | 72.60 | | PBG11111 | 4' x 2.5' x 1" | 25.00 | 55.00 | 42.27 | 93.00 | | PBG11112 | 3' x 3' x 1" | 21.00 | 46.30 | 39.00 | 85.80 | | PBG11113 | 4' x 3' x 1" | 31.00 | 68.00 | 48.00 | 105.60 | | PBG11114 | 5' x 3' x 1" | 30.00 | 66.00 | 63.00 | 138.60 | | PBG11115 | 4' x 4' x 1" | 37.00 | 81.57 | 67.86 | 149.60 | | PBG11117 | 6' x 4' x 1" | 56.00 | 123.45 | 50.00 | 110.00 | | Metric | | | | | |
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| PBG51501 | 300 mm x 300 mm x 25 mm | 3.00 | 7.00 | 3.00 | 6.60 | | PBG51502 | 600 mm x 300 mm x 25 mm | 5.00 | 11.00 | 11.00 | 24.20 | | PBG51503 | 900 mm x 300 mm x 25 mm | 14.00 | 31.00 | 15.00 | 33.00 | | PBG51504 | 1200 mm x 300 mm x 25 mm | 9.00 | 19.84 | 18.00 | 39.60 | | PBG51522 | 600 mm x 450 mm x 25 mm | 8.00 | 18.00 | 15.34 | 33.75 | | PBG51505 | 600 mm x 600 mm x 25 mm | 10.50 | 23.00 | 20.00 | 44.00 | | PBG51506 | 900 mm x 600 mm x 25 mm | 15.00 | 33.00 | 26.00 | 57.20 | | PBG51507 | 1200 mm x 600 mm x 25 mm | 17.00 | 37.00 | 32.00 | 70.40 | | PBG51508 | 1500 mm x 600 mm x 25 mm | 20.96 | 46.20 | 23.00 | 50.70 | | PBG51509 | 750 mm x 750 mm x 25 mm | 14.00 | 30.86 | 26.00 | 57.20 | | PBG51510 | 900 mm x 750 mm x 25 mm | 18.00 | 40.00 | 32.00 | 70.40 | | PBG51511 | 1200 mm x 750 mm x 25 mm | 25.00 | 55.00 | 42.00 | 92.40 | | PBG51512 | 900 mm x 900 mm x 25 mm | 23.00 | 51.00 | 36.92 | 81.40 | | PBG51513 | 1200 mm x 900 mm x 25 mm | 30.00 | 66.00 | 51.00 | 112.20 | | PBG51514 | 1500 mm x 900 mm x 25 mm | 40.00 | 88.00 | 56.88 | 125.40 | | PBG51521 | 1800 mm x 1250 mm x 25 mm | 56.00 | 123.45 | 94.80 | 209.00 |
*These weights are approximate and are subject to change. The information is only to be used as a guideline |
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Additional Optical Breadboards
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1" Aluminum Optical Breadboard
