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Vibration Isolated Optical Tables – Model LTO

Vibration Isolated Optical Tables – Model LTO

BILZ vibration isolated workstations are characterized by outstanding quality and functionality.

Product description:

• Adjustable leveling feet, rigid, welded steel frame.

• Membrane air-spring isolators BiAir® between frame and plate. Other isolators are available.

• Mechanical-pneumatic level control with level accuracy of ±0.0004″ or ±0.004″ (± 0.01 mm or ± 0.1 mm)

Range of application

• Set-up of optical laser systems: interferometer.

• Special microscopy


ModelWidthLengthThicknessTable top heightOptical Table Top (lbs)Max. Load (centered)Air spring
LTO 24″ x 24″ x 2"24″24″2″30″44 lbs550 lbsBiAir 0.15-ED/LT
LTO 24″ x 36″ x 2"24″36″2″30″66 lbs530 lbsBiAir 0.15-ED/LT
LTO 24″ x 48″ x 4"24″48″4″30″94 lbs500 lbsBiAir 0.15-ED/LT
LTO 36″ x 36″ x 2"36″36″2″30″99 lbs500 lbsBiAir 0.15-ED/LT
LTO 36″ x 48″ x 4"36"48"4"30"141 lbs460 lbsBiAir 0.15-ED/LT
LTO 36″ x 60″ x 8"36″60″8″30″218 lbs380 lbsBiAir 0.15-ED/LT
LTO 36″ x 72″ x 8"36″72″8″30″262 lbs340 lbsBiAir 0.15-ED/LT
LTO 48″ x 48″ x 4"48″48″4″30″188 lbs410 lbsBiAir 0.15-ED/LT
LTO 48″ x 60″ x 8"48″60″8″30″291 lbs725 lbs BiAir 0.25-ED/LT
LTO 48″ x 72″ x 8"48″72″8″30″350 lbs666 lbsBiAir 0.25-ED/LT
LTO 48″ x 96″ x 8"48″96″8″30″467 lbs550 lbsBiAir 0.25-ED/LT
LTO 72″ x 72″ x 8"72″72″8"30"556 lbs460 lbsBiAir 0.25-ED/LT
LTO 72″ x 96″ x 8"72″96"8"30"741 lbs1660 lbsBiAir 0.5-ED/LT
LTO 72″ x 120″ x 12"72″120"12"30"1011 lbs1380 lbsBiAir 0.5-ED/LT
LTO 72″ x 144 x 12"72″144"12"30"1315 lbs1080 lbsBiAir 0.5-ED/LT

ModelWidth (cm)Length (cm)Thickness (cm)Table top height (cm)Max. Load Cap.(centered)Air spring
LTO 61×6161617.676550 lbsBiAir 0.25-ED-AL-LT
LTO 61×91619110.276620 lbsBiAir 0.25-ED-AL-LT
LTO 61×1226112215.2761600 lbsBiAir 0.5-ED-ST-LT
LTO 76×1227612215.2761430 lbsBiAir 0.5-ED-ST-LT
LTO 91×91919115.2761550 lbsBiAir 0.5-ED-ST-LT
LTO 91×1229112215.2764400 lbsBiAir 1-ED-ST-LT
LTO 91×1529115215.2764200 lbsBiAir 1-ED-ST-LT
LTO 76×1839118315.2764075 lbsBiAir 1-ED-ST-LT
LTO 122×12212212215.2764400 lbsBiAir 1-ED-ST-LT
LTO 122×15212215215.2764075 lbs BiAir 1-ED-ST-LT
LTO 122×18312218315.2763300 lbsBiAir 1-ED-ST-LT
LTO 122×24412224420.3764960 lbsBiAir 1.5-ED

Weight of Optical Table Top is based on Ferromagnetic steel-Black coated skins top and bottom.  Other skin materials are available.

Table load capacity is based on the Center of Gravity of the load being centered on the table.

Maximum Compressive load: > 55 lbs/in²

The table above shows some common size Optical table tops.  Other Widths and/or Lengths are readily available. Also other Optical Table Top thicknesses are available including: 1/2″, 1″, 2″, 4″, 8″, 10″, 12″, 16″ and 20″.  Please contact our Sales Department for further details.

Note: Optical Table Top thickness dimension is approximate.

Honeycomb Core:                                                                                                             

Most table manufacturers use a metal honeycomb core, which conducts vibrations and has multiple resonant frequencies, and then install tuned vibration dampers to try to suppress the resonances. These dampers are size specific and add significant weight to the table. The nonmetallic honeycomb core in our tables are designed to absorb vibrations. These tables have better vibration performance than metal honeycomb tables without the need for damping, or the extra weight.

honeycomb optical table

Cross-section of Honeycomb Breadboard

The standard honeycomb cores are available in: ½”, 1”, 2”, 4”, 8”, 12”, 16” and 20” thicknesses to offer the optimum choice in vibration damping, strength and weight.  

Core thicknesses of 2″ or 4″ are recommended for boards under 4 feet long or longer boards which are evenly supported. 8″ or thicker cores should be used for 6 – 8 feet and larger tables and where static or dynamic compliance is critical.

Despite the low price, these honeycomb cores feature a very small cell size, 3/8″ (10mm). The small cell size puts more of the core in contact with the metal surface. For those applications where the core must be Aluminum or Stainless Steel, please consult our Sales Department for special pricing.


A high strength-to-weight core combined with careful board design gives us one of the lightest boards on the market.  These standard breadboards weigh in at just 12 lbs (5.4 kg) per square foot.  Boards as large as 2′ x 4′ can be shipped via UPS for additional savings!

At only 15 lbs (6.8 kg) per square foot, our tables (8.3″ / 211mm thick) save on your installation costs as well.  A 4′ x 8′ x 8.3″ (1219 x 2438 x 211mm) table can easily be uncrated and fully installed onto our welded steel frame table by 6 average people in under one hour with just hand tools. 

No movers or special equipment required. For critical light weight applications, we offer Titanium, at 2.2 lbs per square foot (with 2” core) and our “ULTRA” Light Weight material at 3.6 lbs (1.6 kg) per square foot with a 2” (50mm) core.

Sealed Holes, No Oil, No Chips:

All machining, on the skins, core and sides, is done prior to the final assembly.  The components are then cleaned, the holes sealed with a polymeric film (applied just over the holes) and the skins laminated to the core. This produces a product completely free of oil and chips.  The film punctures when screws are inserted allowing sizes up to the full depth of the board (or maximum 3”) to be inserted into the board.

Sealed Holes, No Oil, No Chips

Sealed Holes, No Oil, No Chips

Some brands use a continuous plastic film or formed plastic wells, where the core is bonded to the plastic and not to the metal skin. This type of bond can creep with time or even delaminate. These boards have greater than 50 % of the core directly bonded to their metal skins.

Ferromagnetic Skins:

Unless specified otherwise, the standard top and bottom plate are Ferromagnetic steel.  Other skin materials such as Stainless Steel, Plastic, Aluminum and Titanium are also available.

Using identical top & bottom skins on our standard breadboards and tables avoids the problem of unmatched coefficients of thermal expansion.  It is important to maintain matched thermal expansion coefficients as unmatched thermal coefficients will cause the board to bow even under uniform temperature changes.

Laser Safety:

There are 2 ways to get rid of unwanted laser reflections: absorb them or scatter them. In order to help provide protection against laser reflections and provide an attractive appearance, our boards are coated with a lightly textured flat black polyurethane coating. This coating is impervious to almost all chemicals, highly durable and absorbs >90% of the light incident upon it. The texture is less than 0.001″ (0.03mm) thick yet it helps to scatter an incident laser beam,  preventing unwanted reflections and the potential eye damage from those reflections.

General Specifications – Optical Table / Breadboard Products

Available Skins: Top & bottom skins are the same material unless noted otherwise*

  • (FM) Ferromagnetic Steel: Black Polyurethane Coating 0.125″ (3mm)
  • (ALP) Aluminum:  Black Polyurethane Coating 0.187″ (4mm)
  • (ALN) Aluminum: Natural with Matte finish (no coating) 0.187″ (4mm)
  • (ALK) Aluminum: Black Anodized 0.187″ (4mm)
  • (ALX) Aluminum: Clear Anodized 0.187″ (4mm)
  • (LW) “Ultra” Light Weight 0.187″ (4mm)
  • (LWI) “Ultra” Light Weight (w/ threaded inserts) 0.187″ (4mm)
  • (TI) Titanium with threaded inserts: Natural with Matte Finish 0.032″ (0.8mm)
  • (SS44) Stainless Steel 400 series: 0.125″ (3mm): Black Polyurethane Coated or Natural with Matte
  • (SS4r) 400 series, SS Top, Ferromagnetic Bottom 0.125″ (3mm)*

Core: Lightweight, High Dampening, Honeycomb Style (standard)

  • System Eliminates Resonances
  • Cell size: 3/8″ (10mm) cell
  • Vertically bonded
  • Waterproof 
  • Acid resistant
  • Optional Core Materials — Aluminum Honeycomb or Stainless Steel Honeycomb

Tapped Holes: Lead screw tapped

  • 1/4”-20 (Inch), most common
  • M6 (Metric) holes
  • #8-32 (inch) available
  • #10-32 (inch) available

Finish: Top / Sides / Bottom

  • Standard: Black anti-reflective polyurethane impervious to most chemicals.  Absorbs more than 90% of light incident upon it.  Absorbs more than 95% of the energy in near perpendicular incidence and scatters grazing reflections to less than 5%.
  • Optional: Black anodized or Natural with matte finish (Material Dependent)
  • Optional: Cleanroom Class 100 finish

Top Grid Patterns:

  • Standard: 1” (Center to Center)
  • Cost Saving: 2” (Center to Center)
  • Metric Standard: 25mm (Center to Center)
  • Metric Cost Saving: 50mm (Center to Center)
  • Optional: No grid

Borders and Corners around grid:

  • Standard Border – 1st row 2″ from edge (50mm)
  • Optional Borders – 1st row 1/2” (12.5mm) or 1” (25mm)
  • Rounded corners are standard with our product.

Technical Specifications:

  • Max. Compressive load: > 55 lbs/in² (>3.9N/cm²)
  • Max. Static load before failure: Supported at ends: >11,000lbs (>5000N)
  • Max. Dynamic Deflection Coefficient:  0.3 x 10^-3
  • Max. Relative Motion (in.) – IRDmax:  1.3 x 10^-9
  • Deflection (Supported at 24″): 32 µin/lb (1.5µ/N)
  • Deflection (Supported on legs): 2 µin/lb (0.1µm/N)

Dimensional tolerances:

  • Length, width: +0.05 -0.125″ (3.2mm)
  • Thickness: 0.1″ (2.5mm)
  • Hole positions with respect to other holes: 0.004″ (0.1mm)
  • Hole with respect to edges: 0.1″ (2.5mm)

Flatness (top surface): 0.007” over 1 ft distance for unit sizes 48” x 72” and under.  Over 48” x 72”, .010″ over 1′ with .030″ over the total length.



Can Be Used With

  • bilz-lth-granite-table
  • bilz-lth-special-tables
  • bilz-biair
  • bilz-pvm-valve
  • leveling feet with flexibly attached screw
  • leveling feet
  • vibration-isolation-platform

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