THz Lenses
1. TPX Lenses
Commom specification:
Material TPX Type plano-convex, bi-convex Available diameters, mm to 100 iameter tolerance, mm D+ /-0.25 Clear aperture, % >=90 EFL tolerance (for lenses), % +/- 1 Surface quality (two-sided polishing), scr/dig 80/50 Surface accuracy, mm +/- 0.01 deviation from ideal sphere and plane
The following TPX lenses are available from stock:
No. Diameter EFL mm inches mm 1 25.4 1.0 25.0 2 25.4 1.0 50.0 3 25.4 1.0 100.0 4 25.4 1.0 200.0 5 38.1 1.5 50.0 6 38.1 1.5 75.0 7 38.1 1.5 100.0 8 38.1 1.5 150.0 9 38.1 1.5 200.0 10 50.8 2.0 50.0 11 50.8 2.0 75.0 12 50.8 2.0 100.0 13 50.8 2.0 150.0 14 50.8 2.0 200.0 *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.
2. HRFZ-Si Lenses
We offer HRFZ-Si lensesof different types: hyper-/hypo-/hemispherical, bullet, and meniscus.
Common specification:
Material
HRFZ-Si
Type
spherical, hyper-hemispherical,
hemispherical,
hypo-hemispherical, and bulletAvailable 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.
Commom specification:
Material HRFZ-Si Type positive meniscus Available diameters, mm to 100 Dimensions tolerance, mm +0.0 /-0.1 Thickness tolerance, mm +/-0.1 Edge thickness variation, mm <=0.05 Clear apperture, % 90 EFL tolerance, % +/-1 Surface quality, scr/dig 80/50 Surface figure varies depending on radius Coatings AR coatings upon request
The following HRFZ-Si meniscus lenses are available from stock:
No. Diameter EFL mm inches mm 1 25.4 1.0 25.0 2 25.4 1.0 50.0 3 25.4 1.0 100.0 4 25.4 1.0 200.0 5 38.1 1.5 50.0 6 38.1 1.5 75.0 7 38.1 1.5 100.0 8 38.1 1.5 150.0 9 38.1 1.5 200.0 10 50.8 2.0 25.0 11 50.8 2.0 50.0 12 50.8 2.0 75.0 13 50.8 2.0 100.0 14 50.8 2.0 150.0 15 50.8 2.0 200.0 *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%).
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.