"*" indicates required fields 1Select Your Wood Species2Select Your Construction Style3Choose Their Edge Profile4Additional Information Step: 01Select Your Wood Species* African Mahogany American Beech American Cherry Antique Heart Pine Ash Birch Bolivian Rosewood Brazilian Cherry Bubinga Burmese Teak Butternut Cocobolo Curly Maple Douglas Fir Eucalyptus Grandis European Beech Genuine Mahogany Hard Maple Hickory Iroko Kensington™ Wood Counters Knotty Alder Lyptus Padauk Peruvian Walnut Reclaimed Chestnut Reclaimed Oak Red Oak Santos Mahogany Sapele Mahogany Saxon Wood™ Counters Sipo Mahogany Superior Grade Alder Tigerwood Walnut Wenge White Oak Zebrawood Step: 02Select Your Construction Style* END GRAIN CONSTRUCTION End grain construction is the premium construction style and our recommended surface for direct food preparation. In end grain construction, small wood pieces stand vertically to show only the ends of the wood. Edge Grain Construction In an edge grain top, the wood pieces are laid out with long strips running lengthwise along the top (shown at right). All strips will be continuous with no joints unless the length of the top is excessive. In such instances we will discuss this on a case-by-case basis with you. FLAT GRAIN CONSTRUCTION In a flat grain top, the wood pieces are premium-clear wide plank flat sawn boards. The pieces are generally wider in size. Widths will vary depending on the species and sizes of wood available at the time of manufacturing and will be random-sized unless otherwise specified. Step: 03Choose Edge Profile 1/8″ Roundover 1/4″ Roundover 3/8″ Roundover 1/2″ Roundover 3/4″ Roundover 1″ Roundover Cove 45 Degree Chamfer 15 Degree Chamfer Calver* Charmant* Kassel* Kerpen* Kolossal* Perlen* Rhine* Roman Notch* Sonder* 1-1/2″ Roundover Ogee Ogee Fillet Ogee with Notch Classical Cove Classical Small Bead and Cove French Baroque Standard Roman Ogee Standard Double Roman Ogee Conventional Double Roman Ogee Full Bullnose 1/8″ Beaded Roundover 1/4″ Beaded Roundover 3/8″ Beaded Roundover 1/2″ Beaded Roundover 3/4″ Beaded Roundover 1″ Beaded Roundover Krone* Rugen* Large Classical Bead and Cove Medium Roman Ogee* Medium Double Roman Ogee Super Roman Ogee* Super Roman Ogee with Notch* Super Double Roman Ogee* Super Double Roman Ogee with Notch* Super Double Roman Ogee with Notch* El Guapo* Step: 04Additional Information "*" indicates required fields Please complete the form below and we will contact you within 1-2 business days.First Name*Last Name*Email* Company Name*Newsletter Subscribe to our newsletter Phone*Business Description*RetailTrade PartnerOtherDescribe your Business*Location* Street Address City State / Province / Region ZIP / Postal Code What are the dimensions of the project?Thickness (inches)*Width or depth (inches)*Length (inches)*Options Arcs Breadboard Ends Distressed Wood Countertops Drainboards Engraving Expanded Corners Hand Planed Integrated Bowls Juice Grooves Knife Slots Mitered Corners/Joints Sink Cutout Stove Cutout Trash Holes Trivets Waterfall Countertops Charging System Finishes Grothouse Original Oil™ DURATA® WATERPROOF FINISH Bianca Pigmented Oil Finish Nera Pigmented Oil Finish Upload Design Reference Drop files here or Select files Accepted file types: jpg, png, pdf, Max. file size: 50 MB. Please upload drawings/inspiration photos/or anything else you can share with usThis site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

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Example of a darkfield light path below the sample plane, where only stray rays of light are collected into the rear of the objective.

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In the images below, the fibers do not appear to have a lot of contrast (a), however when illuminated by darkfield microscopy (b) much more contrast is apparent. In some circumstances you have too much contrast (c) when using conventional brightfield, this can also be improved when using darkfield (d) where less contrast is achieved.

As light passes through the sample where small changes in refractive index occur (eg the presence of cellular membranes) the two polarizations will be affected, and hence the interference will change, altering the resultant image.

Light path of a polarized light microscope. Note the polarizing filter below the sample and the analyser above the sample which allow discrete polarizations through.

A cut-away of the light path of a phase contrast upright microscope. The condenser annulus is visible below the condenser which only allows through one phase of light. Above the sample plane the phase plate (or sometimes called phase ring) blocks one specific phase of light, and lets through any light that has been refracted by the sample.

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DIC LightPath in an upright microscope. Here the two Nomarski prisms are visible above and below the sample stage. Note in this arrangement there is also a fixed polarizer and attached Quarter wavelength plate which allows you to rotate 90 degrees in the imaging plane.

In a flat grain top, the wood pieces are premium-clear wide plank flat sawn boards. The pieces are generally wider in size. Widths will vary depending on the species and sizes of wood available at the time of manufacturing and will be random-sized unless otherwise specified.

All bar rail is hand-crafted in any of our stock species and can be stained and finished upon request to match existing decor. Mitered and radial corners are available to accommodate any potential design. Our Chicago Bar Rail is 3 1/8″ total height and 5 3/16″ deep. Once attached to the bar top, the profile rises 1 5/8″ above the bar top. Below are several examples of our bar rail. You can also view a PDF rendering of the bar rail profile.

Darkfield microscopy is a technique to increase contrast in your image when the refractive index of your sample very closely matches the refractive index of your imaging media. The technique works by blocking the light that comes directly onto the sample, and instead relies solely on stray rays of light to illuminate the sample from the image border.

Phase contrast microscopy is a technique used to increase contrast within transparent samples such as cells or thin tissue sections. The technique works by using an annulus at the condenser to only allow certain phases of light though the condenser and onto the sample. At the rear of the objective there is a matching (but inverted) phase plate, which blocks light let through the condenser annulus. Light that is diffracted by the sample will no longer be in the same phase and will bypass the phase ring and be directed onto the camera or imaging device.

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End grain construction is the premium construction style and our recommended surface for direct food preparation. In end grain construction, small wood pieces stand vertically to show only the ends of the wood.

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"*" indicates required fields Please complete the form below and we will contact you within 1-2 business days.Email* Name*Phone*Relation to Industry?*RetailTrade PartnerOtherCompany Name*Location* Street Address City State / Province / Region What Grothouse Products are you interested in?* Countertops Residential Bar Tops Commercial Bar Tops Pastore/Waterfall Tables Floating Shelves Butcherblock Solid Wood Stair Treads Live Edge Custom Tables/Freestanding Island Furniture This field is hidden when viewing the formPhone Number? - An expert will contact you within 48 hours.An expert will contact you within 48 hours of form submission.What are the dimensions of the project?Thickness (inches)*Width or depth (inches)*Length (inches)*Which construction style are you interested in?*Edge Grain - (minimum thickness 1.5 inches) Flat Grain - (minimum thickness 1.75 inches)End Grain - (minimum thickness 2.5 inches)Learn more about our construction options.Tell us about how this piece fit into your space?*What size? Thickness*Can we make the project from multiple slabs? Ie. Bookmatching* Yes No Wood or Anvil?* Wood Anvil Wood with Anvil accents or Anvil over wood grain Edge Style* Square Edge Super Roman Ogee, Super Double Roman Ogee w/ or w/o Notch Medium Double Roman Ogee Standard Roman Ogee or Standard Double Roman Ogee Large Classical Bead & Cove Classical Bead and Cove Standard Ogee Classical Cove, Beaded Roundover or Ogee Fillet Roundover Chamfer Cove Custom Conventionial Double Roman Ogee French Baroque Medium Roman Ogee El Guapo Krone Learn more about our Edge profile options.Which wood species did you have in mind?*Learn more about our wood types.Any special textures? Wire Brushing, distressing, handplaning, etc.*Finishing Options?* None Mineral Oil Durata Matte & Satin (Flat and Edge Grain only) Stain with Durata Topcoat (Flat and Edge Grain only) Stain & Glaze with Durata Topcoat (Flat and Edge Grain only) Pigmented Oil Bianca™ Pigmented Oil Nera™  What Metals did you have in mind?*Cast or Polished Finish?* Cast Polished Natural (will patina) or Durata Overcoat* Natural Durata Overcoat Upload Inspirational Photos Drop files here or Select files Accepted file types: jpg, png, pdf, Max. file size: 50 MB. Please upload drawings/inspiration photos/or anything else you can share with usThis site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.CAPTCHA

Brightfield microscopy is one of the most basic light microscopy techniques whereby the sample is illuminated by white light that is transmitted through the sample onto the detector. There are different methods available to increase contrast in brightfield images (phase contrast, DIC, Polarized Light and Darkfield) which are available on different systems.

In a polarized light microscope a polarizing filter is added immediately after the brightfield light source and an additional polarizing filter is fitted above the sample before the eyepieces or image capture device. The polarizer below the sample is usually adjustable by rotation to select for different polarization angles. See the light path diagram below.

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Polarized light microscopy is a contrast enhancing technique that improves resultant images where the sample being imaged has birefringent properties. This technique is often used for materials science, however can be very useful for some biological applications.

Normal white light is unpolarized, however optical elements can filter only one specific polarization as per the image below.

Brightfield imaging or transmitted light microscopy usually has very low contrast between signal and background, therefore there are a number of techniques available which will be explained below.

Ensuring the condenser is in the right position is vital for all of these techniques. To perform the correct alignment on the condenser requires a technique called Kohler Illumination, which examples and further explanations can be found here.

In an edge grain top, the wood pieces are laid out with long strips running lengthwise along the top (shown at right). All strips will be continuous with no joints unless the length of the top is excessive. In such instances we will discuss this on a case-by-case basis with you.

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Differential Interference Contrast (DIC) microscopy is a method used to enhance the contrast of transmitted light images by using polarization of light. By the introduction of two Nomarski prisms (one above and one below your sample), light is sheered into two discrete polarizations which interfere with one-another at the sample plane.

From fine commercial locations to the most discerning home interiors, Grothouse supplies some of the most unique and well-crafted bar tops currently available on the market today. Whether you strive to achieve a classic look with hand-crafted Chicago Bar Rail or a more contemporary serving area using exotic woods, our bar top designs are limited only by your imagination.