COVID-19 Update: Westech Optical services essential business and thus remains open during these uncertain times. We have implemented steps to ensure fulfillment of orders as we continue to work with our valued customers and partners. We have curtailed all travel and adopted CDC/Government recommended work practices such as instituting remote work where possible and social distancing at our facilities.
    Stay safe and please contact us if you have any concerns.

    Westech produces  achromatic lenses or achromats, which are designed to limit the effects of chromatic and spherical aberrations. Achromats are corrected to bring two different wavelengths  of light into focus within the same image plane.

    The most common type is the achromatic doublet, consisting of two glass lenses. Typically, one lens is a negative flint glass, and the other is a positive crown element. The lenses are usually cemented together and are available in diameters from 5.0mm to 125.0mm.

    Westech also produces air-spaced doublets which offer better control over chromatic and spherical aberrations than do cemented achromats, these require mounting in a barrel, using a spacer to maintain the central airspace.

    Positive Achromats

    Westech achromats are available in focal lengths from 10.0mm to 500mm.  MgF2 coating is standard. BBAR and other custom coatings are always available. Minimum purchase quantities may apply to these orders. Contact us for details.

    Negative Achromats

    These lenses are primarily used to increase the focal length of other lenses or lens systems (Barlow Lens) or to expand a light source. Westech can provide any EFL or diameter in a variety of glass types and housings.

     

    STANDARD TOLERANCES

    EFL: +/- 2%

    CT: +/- 0.1

    Diameter: +0.0 – 0.1

    Surface Accuracy: 2 ½ X 1 Fringe

    Scratch/Dig: 60-40

    TIA: 1’

    Standard Coating: MgF2

    Achromats

     

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    Diameter EFL P/N
    5.00 10.00 7625 NR
    5.00 15.00 7630 NR
    5.00 20.00 7635 NR
    10.00 20.00 7640 NR
    10.00 25.00 7205 NR
    12.50 20.00 7987 NR
    12.50 25.00 7988 NR
    12.50 30.00 7435 NR
    12.50 35.00 7989 NR
    12.50 40.00 7990 NR
    12.70 50.00 7230 NR
    15.00 25.00 7645 NR
    15.00 30.00 7650 NR
    15.00 40.00 7655 NR
    15.00 50.00 7660 NR
    20.00 30.00 7991 NR
    20.00 40.00 7665 NR
    25.00 50.00 7670 NR
    25.00 60.00 7675 NR
    25.00 65.00 7215 NR
    25.00 75.00 7615 NR
    25.00 100.00 7195 NR
    25.00 125.00 7680 NR
    30.00 60.00 7685 NR
    30.00 80.00 7690 NR
    30.00 100.00 7695 NR
    30.00 125.00 7992 NR
    30.00 150.00 7700 NR
    31.50 80.00 7375 NR
    40.00 60.00 7705 NR
    40.00 100.00 7710 NR
    40.00 120.00 7610 NR
    40.00 160.00 7715 NR
    50.00 100.00 7720 NR
    50.00 120.00 7725 NR
    50.00 150.00 7730 NR
    50.00 160.00 7735 NR
    50.00 200.00 7740 NR
    50.00 250.00 7745 NR
    75.00 200.00 7750 NR
    75.00 250.00 7755 NR
    75.00 300.00 7760 NR
    75.00 400.00 7765 NR
    75.00 500.00 7770 NR

     

    To learn more about our company, our products or any of the services we offer, get in touch with Westech Optical today and we’ll be happy to get you started. You can reach us by phone at 585-377-2490 or via email by filling out our quick contact form.

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