Transmission Grating Beamsplitters with Grooves Per mm 80 and Size (mm) 25 mm Sq.

Transmission Grating Beamsplitter for He-Ne Lasers

Optometrics transmission grating beamsplitters are commonly used for laser beam division and multiple laser line separation in visible wavelengths to diffract the transmitted beam into multiple orders.

They consist of an index matched epoxy replica on a polished glass substrate resulting in high total efficiency. These beamsplitters are designed specifically for useful division of He-Ne lasers.

Several types of gratings are available that offer different dispersion and power distributions. The diffraction angle for any wavelength may be calculated using the grating equation for normal incident light.

↓ Scroll down to view product inventory ↓

Product SKUs

  • 80 Groove, Transmission Grating Beamsplitter, 25 mm Sq., 3 mm Thick

    Available on backorder
    Add to cart

    Transmission Grating Beam Splitter Specifications | TGB80-25

    Optical Coating


    Grooves Per mm


    632.8 nm Efficiency at -2nd Order

    5% Nominal

    632.8 nm Efficiency at -1st Order

    25% Nominal

    632.8 nm Efficiency at 0th Order

    25% Nominal

    632.8 nm Efficiency at +1st Order

    25% Nominal

    632.8 nm Efficiency at +2nd Order

    5% Nominal



    Size (mm)

    25 mm Sq.

    Size Tolerance

    ±0.5 mm


    3 mm

    Thickness Tolerance

    ±0.5 mm



    Clear Aperture


    Edge Angle

    90° ±0.50°


    90° ±0.50°

    Operating Temperature Range

    -50° C to +125° C

    Damage Threshold: Pulsed

    350 mJ/cm², 200 nano sec. pulse

    Damage Threshold: CW laser

    40 watts/cm²

Save & Share Cart
Stash it away! We'll save and create a unique link to your cart. You (or anyone with the link) will be able to use the link to retrieve the cart. Pretty cool but shop responsibly!
Back Save & Share Cart
We're ready! Are you? Remember, anyone who has the unique link to your cart will be able to retrieve it. So, share responsibly.
Your cart email sent successfully :)

Receive 5% off plus FREE shipping. Don't miss this deal!

No thanks! I'll pay full price. *Coupon will be sent via email. Free shipping to US only.