THz Lenses
 |
Download THz Lenses Datasheet (PDF, 302 KB) |
We offer THz lenses made of TPX and HRFZ-Si.
Common specification:
|
The following TPX lenses are available from stock:
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
*All EFLs are calculated for wavelength 300 µm. EFL deviations related with refraction index dispersion at the edges of THz range (30-3000 µm) and within visible range are negligible in comparison with EFL tolerances manufactured.
Alternate sizes (max thickness 30 mm) and custom design are manufactured upon request.
For price quotation and delivery please fill in our Request Form.
| Material | HRFZ-Si |
| Type | spherical, hyper-hemispherical, hemispherical, hypo-hemispherical, and bullet |
| Available diameters, mm | 2-150 |
| Dimensions tolerance, mm | +/-0.1 |
| Clear apperture, % | >=90 |
| Surface quality, scr/dig | 80/50 |
| Surface accuracy, mm | +/-0.01 deviation from ideal sphere and plane |
| Coating | AR coatings upon request |
The polished 'ball-shaped' blanks of HRFZ-Si (with diameters 2.0, 4.0, 6.0, 8.0, 10.0, and 12.0 mm) are always in stock. Upon your request hyper-/hypo-/hemi-spheres will be supplied within 2 weeks as the flat surface of the lens can be polished for the required thickness.
The finished parts of different dimensions are available from stock and supplied within a week.
For price quotation and delivery please fill in our Request Form.
Also we offer HRFZ-Si meniscus lenses.
Common specification:
|
The following HRFZ-Si meniscus lenses are available from stock:
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
*All EFLs are calculated for wavelength 300 µm. EFL deviations related with refraction index dispersion at the edges of THz range (30-3000 µm) and within visible range are negligible in comparison with EFL tolerances manufactured (+/-1%).
Please check Optics stock.
Alternate sizes and custom designs are manufactured upon request. Negative meniscus lenses are available. Tydex also produces aspherical silicon lenses according to customer specification. Quality of aspherical surface characterises by a roughness Ra of 15 nm.
3. HRFZ-Si Axicones
A conical lens, or axicone, is used to transform a Gaussian beam into a Bessel beam. An axicone focuses radiation into a line consisting of a set of points along the optical axis. The line forms an equal-width ring with diameter increasing with the distance from the optical element.
Common specification:
| Material | HRFZ-Si |
| Type | axicone (conical lens) |
| Available diameters, mm | 25-150 |
| Dimensions tolerance, mm | +/-0.2 |
| Angular tolerance, arc. min. | +/-30 |
| Roughness | Ra 15 nm |
| Coatings | AR coatings upon request |
HRFZ-Si axicones are manufactured upon request.
Please read the article Terahertz Vortex Beam as a Spectroscopic Probe of Magnetic Excitations that describes how terahertz vortex beams were generated using transparent axicons.
For price quotation and delivery please fill in our Request Form.
Optics is ready to be shipped!
Optics Stock
Shipment/ Payment/ Warranty ...
