THz Lenses
We offer THz lenses made of TPX and HRFZ-Si and THz axicons madeof HRFZ-Si.

2. HRZF-Si Lenses

1. TPX Lenses

Common specification:

Common specification:

Material

HRFZ-Si

Typespherical,hyper-hemispherical, hemispherical, hypo-hemispherical, andbullet

Material

TPX

Type

plano-convex, bi-convex

Available diameters, mm

to 100Dimensions tolerance, mm+ /-0.25

Available diameters, mm

2–150

Clear aperture, %>=90Dimensions tolerance, mm+/-0.1

Effective focal length (EFL)
tolerance, %+/- 1

Clear aperture, %>=9080/50Surface quality (two-sided polishing), scr/dig

80/50

Surface quality (two-sided polishing), scr/dig
Surface accuracy, mm

Surface accuracy, mm+/-0.01 deviation from ideal sphereand plane+/-0.01 deviation from ideal sphereand plane

Coatings

AR coatings upon request

The following TPX lenses are available from stock:
DiameterNo.

EFL*mminches

mm

125.4

1.0

25.0

2

25.4

1.0

50.0

325.4

1.0

100.0

425.4

1.0

200.0

5

38.1

1.5

50.0

638.1

1.5

75.0

7

38.1

1.5

100.0

8

38.1

1.5

150.0

938.1

1.5200.0

1050.82.0

50.0

1150.82.075.01250.82.0

100.0

1350.82.0

150.0

1450.82.0

200.0*All EFLs are calculated for wavelength 300 µm. EFL deviations relatedwith refraction index dispersion at the edges of THz range (30-3000µm) and within visible range are negligible in comparison with EFL
tolerances manufactured. Alternate sizes (max thickness 30 mm) andcustom designs are manufactured upon request.

T<D/2
Hypo-Hemispherical

T>D/2
Hyper-Hemispherical

T=D/2
Hemispherical

T = L + A, where A <= D/2Bullet

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 andsupplied within a week. Please check the Optics stock at our website.
For price quotation and delivery please e-mail us.
We also offer HRZF-Si meniscus lenses .

16 Domostroitelnaya str.
194292 St. Petersburg, Russia
www.tydex.ru

Phone: 7-812-3318702
Fax: 7-812-3092958
E-mail: optics@tydex.ru

THz Lenses
3. HRFZ-Si Axicones

Common specification:
Material

HRFZ-SiType

positive meniscus

Available diameters, mm t

to 100

Diameter tolerance, mm+0.0 / -0.1

Thickness tolerance, mm+/-0.1

Edge thickness variation, mm<= 0.05

Clear aperture, %90

Effective focal length (EFL)
tolerance, %+/-1

Surface quality (two-sided polishing),
scr/dig

80/50

Surface figure

varies depending on radius

Coatings

AR coatings upon request

A conical lens, or axicone, is used to transform a Gaussian beam into aBessel beam. An axicone focuses radiation into a line consisting of a setof points along the optical axis. The line forms an equal-width ring withdiameter increasing with the distance from the optical element.

The following HRZF-Si meniscus lenses are available from stock:
DiameterNo.

EFL*mminches

mm

125.4

1.0

25.0

2

25.4

1.0

50.0

325.4

1.0

100.0

4

25.4

1.0

200.0

Material

HRFZ-Si538.1

1.5

50.0

Typeaxicone (conical lens)638.1

1.575.0

Available diameters, mm t25-150

Common specification:

738.1

1.5

100.0

Diameter tolerance, mm+/-0.2838.1

1.5150.0

Angular tolerance, arc. min.

+/-30

938.1

1.5

200.0Roughness

Ra 15 nm1050.82.0

25.0

Coatings

AR coatings upon request

1150.82.0

50.0

1250.82.0

75.0

1350.82.0

100.0

1450.82.0

150.0

1550.82.0

200.0*All EFLs are calculated for wavelength 300 µm. EFL deviations relatedwith refraction index dispersion at the edges of THz range (30-3000µm) and within visible range are negligible in comparison with EFL
tolerances manufactured.
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 aroughness Ra of 15 nm.
For price quotation and delivery please fill in Request Form on ourwebsite.

16 Domostroitelnaya str.
194292 St. Petersburg, Russia
www.tydex.ru

Phone: 7-812-3318702
Fax: 7-812-3092958
E-mail: optics@tydex.ruHRFZ-Si axicones are manufactured upon request.
For price quotation and delivery please fill in Request Form at ourwebsite.