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18×20mm,1625nm,1/2λ,true zero order,waveplate

18×20mm,1625nm,1/2λ,true zero order,waveplate

$120.00 USD
$120.00 USD
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Shipping calculated at checkout.
Wavelength \ Order \ Retardance
Dimension
Mounting

Shipping & Leadtime

For stocked products, shipment will usually be made within 5 working days after order.

For customized products, shipment will usually be made within 4-8 weeks after order.

Mounting

Mounting Ring is available for . The ring will be slightly bigger than the filter itself.

For example a dia25mm ring can hold waveplate from dia22mm to dia24.5mm.

Email us for detail mounting options.

Return

You will have a 14 days window for requesting return after you received the item.

*There will be a flat rate of $35 for return processing.

Payment Option

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For organization purchase under $100. The order is eligible for Afterpay. (payment within 15 days after received)

  • Purchase Order is required from your organization

For purchase amount above $100. You need to make payment in advance or request for a flexible payment terms.

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Specifications of Waveplate

  • Design Wavelength (DWL)

    This specifies the wavelength for which the waveplate is designed to introduce the desired phase difference. Performance can deviate slightly at wavelengths further away from the center wavelength.

  • Retardance

    Quarter-wave plate (λ/4): Introduces a phase difference of one-quarter wavelength (π/2) between the fast and slow axes. This is commonly used to convert linearly polarized light into circularly polarized light.

    Half-wave plate (λ/2): Introduces a phase difference of one-half wavelength (π) between the fast and slow axes. This is often used to rotate the plane of linearly polarized light.

  • Waveplate Order

    This refers to the number of wavelengths of phase difference introduced by the waveplate. Zero-order waveplates offer the most consistent performance across a wider wavelength range, while multi-order waveplates are generally more affordable but have a higher dependence on wavelength.

  • Material

    The material of the waveplate determines its birefringence (the difference in refractive index for different polarizations) and operating wavelength range. Common materials include quartz, calcite, and polymer films.

Waveplate Input and Output

Quarter-Wave Plate (λ/4):

Input: Linearly polarized light

Output: Circularly polarized light

This type of waveplate converts linearly polarized light into circularly polarized light.

Half-Wave Plate (λ/2):

Input: Linearly polarized light

Output: Rotated linearly polarized light (by 90 degrees)

Half-wave plates rotate the plane of linearly polarized light by 90 degrees.

While the above describes the behavior for linearly polarized light input, half-wave plates can also be used with circularly polarized light:

Input: Circularly polarized light

Output: Linearly polarized light (depends on the initial circular polarization state)

However, the resulting linear polarization state after using a half-wave plate with circularly polarized light depends on the original handedness (right or left) of the circular polarization.

Different Construction of Waveplates

  • Single Plate

    Construction: Made from a single piece of birefringent material, such as quartz or mica.

    Features:

    • Simple design with a defined thickness that determines the phase shift (e.g., quarter-wave or half-wave).
    • Commonly used in applications where precise control over polarization is required.
    • Limited in terms of thermal stability and wavelength range compared to more complex designs

  • Cemented

    Construction: Two birefringent plates bonded together using optical cement.

    Features:

    • Provides greater durability compared to air-spaced designs, suitable for rugged environments.
    • Typically operates within a temperature range of -30°C to +80°C.
    • However, this construction can lead to degradation in beam deviation and wavefront quality due to the presence of the cement layer

  • Air Spaced

    Construction: Composed of two birefringent plates separated by an air gap.

    Features:

    • High laser damage threshold and excellent performance across a wide temperature range.
    • Maintains optimal beam deviation and transmitted wavefront quality.
    • More expensive due to the need for coatings on both surfaces to minimize reflective losses

  • Optical Contact

    Construction: Two polished surfaces are brought into contact without any adhesive, relying on Van der Waals forces for bonding.

    Features:

    • Excellent preservation of beam deviation and transmitted wavefront quality.
    • Sensitive to temperature changes; large units may require careful handling to prevent separation due to thermal stress.
    • Ideal for high-performance applications where maintaining optical integrity is critical
    more about optical contact 

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