The Thorlabs VRC3 is a credit-card-sized detector card for viewing light in the 300 to 540 nm wavelength range. The lower front surface of this durable plastic card is photosensitive, made from a slow-fading phosphor, and enables the easy location of ultraviolet (UV) and visible (through 540 nm) light beams and focal points. As it is not necessary to charge the active region of the card before use, either CW or pulsed incident light will generate emission, even when the card is used in a darkened room.
- Does Not Require Charging
- Two Engraved Reticles for Use in Beam Collimation
- Absorption Wavelength Range Printed on Card
- Overall Dimensions (W x H): 2.10" x 3.40"
- RoHS and REACH Compliant
To facilitate the use of the card during alignment procedures, the detection region extends all the way to the edge of the card and includes two engraved reticles for use in laser beam collimation. These reticles, formed from lines that are 0.004" (0.10 mm) wide, feature two concentric circles that have diameters of 0.06" (1.5 mm) and 0.28" (7.2 mm), as well as horizontal and vertical lines that are 0.51" (13.0 mm) long. When the card is used in a darkened room with a sufficiently bright source, the fluorescence from the activated photosensitive region can be seen through the back of the card. The photosensitive region can also be activated by illuminating the back of the card, which is useful when aligning two beams to overlap.
See the full range of Thorlabs Laser Viewing Cards here.
Thorlabs' detector cards include light-sensitive active areas that enable the location of a UV, visible, near-IR (NIR), or mid-IR (MIR) laser beam and its focal point. To facilitate their use during alignment procedures, every card, except Item # VRC5, has a detection region that extends all the way to the edge of the card and two engraved reticles for use in laser beam collimation.
Please note that these detector cards are not intended to be used as laser beam blocks, and appropriate safety measures should be taken when working with laser beams.
Features
- Detector Cards for UV, Visible, NIR, or MIR Wavelength Ranges
- Detect Radiation as Low as 1 nW/cm2
- Absorption Wavelength Range(s) or Sensitivity Curve Printed on Card
Sensitivity graph:
| VRC3 Specifications | |
|---|---|
| Spectral | |
| Absorption Wavelength Range | 300 - 540 nm |
| Emission Wavelength Range | 520 - 700 nm |
| Emission Center Wavelength | 580 nm |
| Sensitivity Graph | above |
| Dimensional | |
| Active Region | 2.10" x 1.20" (53.3 mm x 30.5 mm) |
| Overall | 2.10" x 3.40" (53.3 mm x 86.4 mm) |
| Visible Emission Performance | |
| Charging Required for Emission | No |
| Minimum Continuous Stimulation for Emissiona | <0.5 mW/cm2 |
| Persistence of Emissionb | 4 s to 10 s |
| Damage Threshold, Single 11 ns Pulse, 20 Hz | |
| 266 nm | 2.30 MW/cm2 |