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CF Flanged Quartz (Fused Silica) Laser Transmission Viewports

CF Flanged Quartz (Fused Silica) Laser Transmission Viewports for UHV Optical Applications

CF Flanged Quartz (Fused Silica) Laser Transmission Viewports from TFM are engineered for high-precision optical access in ultra-high vacuum (UHV) environments where laser transmission, wavelength stability, and chemical purity are essential. Designed for compatibility with ConFlat® (CF) flanges, these viewports feature high-purity fused silica windows with coatings tailored for common laser wavelengths such as 1064 nm, 532 nm, 355 nm, and others.

Built from superior-grade materials, each CF Flanged Quartz (Fused Silica) Laser Transmission Viewport is vacuum-sealed using fully annealed copper gaskets, minimizing thermomechanical strain and ensuring long-lasting performance in optical, analytical, or deposition systems. When used in processes where deposition may occur, the use of a viewport shutter is highly recommended to protect the optical surface and preserve performance over time.

Key Features of CF Flanged Quartz (Fused Silica) Laser Transmission Viewports:

  • UHV-Compatible Construction: Fabricated using 304L stainless steel and precision-mounted fused silica optics, these viewports are suitable for pressures down to 10⁻¹⁰ Torr and temperatures up to 250°C during bakeout.

  • Laser-Optimized Coatings: Anti-reflective coatings are available to match specific laser wavelengths, minimizing loss and maintaining beam fidelity across the transmission surface.

  • Durable Knife-Edge Sealing: Designed to work with fully annealed copper gaskets, reducing induced stress and maintaining reliable sealing under vacuum cycling.

  • High Optical Transmission: Fused silica offers excellent transmission from deep UV (200 nm) through near-infrared (2.5 μm), ensuring compatibility with a wide range of laser and optical diagnostic systems.

Applications of CF Flanged Quartz (Fused Silica) Laser Transmission Viewports:

  • Laser beam delivery into UHV reaction chambers

  • High-resolution spectroscopy under vacuum

  • Plasma diagnostics using UV or visible lasers

  • Optical monitoring in semiconductor and coating systems

TFM’s CF Flanged Quartz (Fused Silica) Laser Transmission Viewports are trusted for their exceptional clarity, thermal stability, and UHV compatibility. Whether in research labs, semiconductor fabs, or optical metrology systems, these viewports ensure dependable transmission and system integrity in even the most demanding vacuum environments.

Ordering Table

Drawing Flange / Mounting Window Material Wavelength Optimization Reflection (avg) View Area Window Thickness Flange Material Sleeve Material PartNumber
Tooltip DN16CF (1.33" OD) Corning HPFS 7980 Fused Silica 780nm <0.25% Per Surface 0.63 0.085 304L SS 304L SS VPZL-133LDIO
Tooltip DN16CF (1.33" OD) Corning HPFS 7980 Fused Silica 808nm <0.25% Per Surface 0.63 0.085 304L SS 304L SS VPZL-133LDIO3
Tooltip DN16CF (1.33" OD) Corning HPFS 7980 Fused Silica 1064nm <0.25% Per Surface 0.63 0.085 304L SS 304L SS VPZL-133LYAG
Tooltip DN16CF (1.33" OD) Corning HPFS 7980 Fused Silica 780nm and 1064nm <0.25% Per Surface 0.63 0.085 304L SS 304L SS VPZL-133LYAGD2
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica Excimer Grade 193 193nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LARF
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica 780nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LDIO
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica 1550nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LDIO2
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica 808nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LDIO3
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica Excimer Grade 248 248nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LKRF
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica 1064nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LYAG
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica 355nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LYAG3
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica 532nm and 1064nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LYAGD1
Tooltip DN35CF-DN40CF (2.75" OD) Corning HPFS 7980 Fused Silica 780nm and 1064nm <0.25% Per Surface 1.40 0.125 304L SS 304L SS VPZL-275LYAGD2
Tooltip DN63CF (4.50" OD) Corning HPFS 7980 Fused Silica Excimer Grade 193 193nm <0.25% Per Surface 2.69 0.250 304L SS 304L SS VPZL-450LARF
Tooltip DN63CF (4.50" OD) Corning HPFS 7980 Fused Silica 780nm <0.25% Per Surface 2.69 0.250 304L SS 304L SS VPZL-450LDIO
Tooltip DN63CF (4.50" OD) Corning HPFS 7980 Fused Silica 1550nm <0.25% Per Surface 2.69 0.250 304L SS 304L SS VPZL-450LDIO2
Tooltip DN63CF (4.50" OD) Corning HPFS 7980 Fused Silica Excimer Grade 248 248nm <0.25% Per Surface 2.69 0.250 304L SS 304L SS VPZL-450LKRF
Tooltip DN63CF (4.50" OD) Corning HPFS 7980 Fused Silica 1064nm <0.25% Per Surface 2.69 0.250 304L SS 304L SS VPZL-450LYAG
DN63CF (4.50" OD) Corning HPFS 7980 Fused Silica 532nm <0.25% Per Surface 2.69 0.250 304L SS 304L SS VPZL-450LYAG2
Tooltip DN63CF (4.50" OD) Corning HPFS 7980 Fused Silica 532nm and 1064nm <0.25% Per Surface 2.69 0.250 304L SS 304L SS VPZL-450LYAGD1

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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