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Microstructured Precision Optics

The best known microstructured optic is the Fresnel Lens.

This is a special optical lens. Compared to a standard lens, the surface of the fresnel lens is divided into a number of concentric grooves.

Using plastic microstructured optical components offers many advantages over conventional optical products:

significant reduction in weight, thickness and volume;
ease in manufacturing of extremely high-aperture (fast) elements and large-area optical components;
almost unlimited flexibility in optical design;
cost-effective custom finishing of parts to virtually any shape and dimension.

ORAFOL
Fresnel Optics GmbH
Flurstedter Marktweg 13
99510 Apolda, Germany
Tel.: +49 3644 50110

info@fresnel-optics.de

ORAFOL Fresnel Optics Brochure (pdf, 4 MB)

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Positive Fresnel Lenses

Positive Fresnel Lenses can be designed as a collimator, collector or with finite conjugates. They are usually corrected for spherical aberration.

Part Number	Focal Length	Facet Spacing	Fresnel Conjugate	Plano Conjugate	Clear Aperture

SC 230	6.3	0.102	6.3	infinite	10.0
SC 245	10.8	0.125	10.8	infinite	6.4
SC 926	16.1	0.102	infinite	16.1	7.0
SC 231	16.3	0.127	infinite	16.3	18.0
SC 259	18.3	0.254	infinite	18.3	17.3
SC 253	24.0	0.475	infinite	24.0	23.3
SC 256	26.6	0.508	infinite	26.6	59.7
SC 258	28.7	0.635	infinite	28.7	45.0
SC 234	38.0	0.381	38.0	infinite	56.3
SC 244	40.8	0.381	40.8	infinite	86.9
SC 297	42.4	0.076	42.4	infinite	29.8
SC 252	48.3	0.076	48.3	infinite	63.3
SC 235	50.8	0.229	infinite	50.8	77.0
SC 241	51.0	0.762	51.0	infinite	109.8
SC 211	57.8	0.076	263.9	74.0	88.4
SC 277	68.5	0.076	infinite	68.5	88.9
SC 250	69.6	0.279	infinite	69.6	75.4
SC 236	72.5	0.279	infinite	72.5	101.3
SC 251	76.3	0.127	76.3	infinite	82.1
SC 237	77.5	0.254	infinite	77.5	59.4
SC 949	97.1	0.254	infinite	97.1	201.8
SC 242	101.1	0.305	101.1	infinite	85.8
SC 239	102.8	0.508	infinite	102.8	133.9
SC 228	111.8	0.508	infinite	111.8	164.0
SC 255	128.3	0.254	infinite	128.3	126.7
SC 948	129.1	0.350	infinite	129.1	180.5
SC 209	137.8	0.254	infinite	137.8	151.0
SC 248	151.7	0.127	151.7	infinite	152.9
SC 249	152.0	0.381	152.0	infinite	205.4
SC 223	152.8	0.254	infinite	152.8	202.4
SC 246	203.0	0.457	infinite	203.0	228.9
SC 950	219.0	0.302	infinite	219.0	223.3
SC 210	225.5	0.178	2007.0	254.0	257.6
SC 264	234.7	0.508	infinite	237.7	253.1
SC 917	239.6	0.152	infinite	239.6	386.4
SC 921	253.6	0.254	infinite	253.6	179.0 x 128.4
SC 221	254.1	0.508	infinite	254.1	255.8
SC 928	255.3	0.152	infinite	255.3	386.6
SC 208	279.3	0.508	infinite	279.3	405.8
SC 205	282.8	0.076	610.0	531.5	330.4
SC 268	304.6	0.508	infinite	304.6	291.9
SC 240	317.0	0.205	infinite	317.0	382.4
SC 934	336.5	0.152	infinite	336.5	386.0
SC 265	385.6	0.508	626.9	1013.6	324.0
SC 2045	391.5	0.508	6096.0	419.0	452.9
SC 229	400.0	0.508	infinite	400.0	386.0
SC 903	500.5	0.508	1500.0	750.0	657.0
SC 943	502.1	0.100	infinite	502.1	549.7
SC 273	505.5	0.203	749.0	1575.0	405.9
SC 214	607.8	0.508	infinite	607.8	460.9
SC 922	698.6	0.508	infinite	698.6	615.7
SC 213-600	763.4	0.508	infinite	763.4	600.0 x 590.0
SC 2135	764.0	0.508	infinite	764.0	437.3

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 169 KB)

Negative Fresnel Lenses

A negative Fresnel lens is the opposite of a positive Fresnel lens with diverging light rays.

Part Number	Focal Length	Facet Spacing	Fresnel Conjugate	Plano Conjugate	Clear Aperture
SC 259 neg	-18.3	0.254	infinite	-18.3	16.6
SC 239 neg	-102.8	0.508	infinite	-102.8	139.4
SC 902 neg	-129.6	0.254	infinite	-129.6	230.1
DC 1100L neg	-185.8	0.508	infinite	-185.8	269.0
DC 427L neg	-205.7	0.508	infinite	-205.7	302.0
DC 434U neg	-255.3	0.508	infinite	-255.3	302.0
SC 973 neg	-508.0	0.508	infinite	-508.0	408.7
SC 2135 neg	-764.0	0.508	infinite	-764.0	436.3

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 98 KB)

Fresnel Prism

A Fresnel Prism has a linear structure with a constant prism angle. It deflects collimated light with a constant deflection angle.

Part Number	Deflected Angle	Facet Spacing	Clear Aperture	Prism Direction

PR 727	5°	0.508	303.7 x 164.4	parallel to long dimension
PR 709	10°	1.016	216.6 x 216.6	-
PR 723	12°	0.152	165.2 x 165.2	-
PR 675	15°	0.330	456.5 x 374.0	parallel to long dimension
PR 729	16°	0.152	241.7 x 240.3	parallel to long dimension
PR 712	23°	0.127	147.6 x 146.7	parallel to long dimension

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 97 KB)

Fresnel Beamsplitter

A Fresnel Beamsplitter has a linear structure with two facets of opposite slope angles. The light is split into two beams and the included angle between the two beams is referred to as the separation angle.

Part Number	Separation Angle	Facet Spacing	Clear Aperture	Prism Direction

PR 775	20°	0.508	369.4 x 367.00	parallel to long dimension
PR 765	32°	2.000	164.9 x 164.7	parallel to long dimension
PR 703	42°	0.508	308.6 x 308.6	-
PR 757	51°	1.106	256.4 x 206.9	parallel to long dimension
PR 713	51°	0.305	340.1 x 269.2	parallel to long dimension

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 96 KB)

Fresnel Cylindrical Lenses

A Fresnel cylindrical lens has a linear fresnel structure. It collects light in one direction and the result is a line image instead of a point image.

Part Number	Focal Length	Facet Spacing	Fresnel Conjugate	Plano Conjugate	Clear Aperture

CY 575	12.7	0.127	12.7	unendlich	311.7 x 13.2
CY 585	37.6	0.254	unendlich	37.6	206.7 x 42.6
CY 581	76.2	0.254	unendlich	76.2	364.5 x 77.4
CY 570	138.0	0.254	390.5	211.7	142.6 x 117.0

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 96 KB)

Lenticulars

Lenticulars have linear structures where every groove has a small radius creating multiple line images. They are primarily used for projection screens and three dimensional images.

Part Number	Radius	Facet Spacing	Clear Aperture	Lenticular Direction

LN 760	0.077	0.127	61.5 x 61.5	-
LN 611	0.157	0.187	99.2 x 99.2	-
LN 615	0.380	0.763	Ø 89.4	-
LN 629	0.483	0.381	114.3 x 114.3	-
LN 663	0.544	0.508	512.7 x 422.1	parallel to long dimension
LN 692	0.762	0.162	230.2 x 180.0	parallel to short dimension
LN 636	0.762	0.186	260.2 x 259.2	parallel to short dimension
LN 669	0.762	0.368	259.0 x 258.3	parallel to short dimension
LN 676	1.118	0.559	432.0 x 429.1	parallel to short dimension
LN 665	3.175	2.794	174.2 x 121.9	parallel to long dimension

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 97 KB)

Corner Cube Retro-Reflectors

Corner cube retro-reflectors are very small, efficient prism corner reflectors that send backlight in nearly the same direction from which it came.

Part Number	Cube Size 'A'	Clear Aperture

OT 853	0,864	diameter 225,5
OT 867	0,254	triangle 284,5

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 94 KB)

Surface Relief Diffusive Microstructures

Surface relief diffusive microstructures (SRDM) are used for specifically distributing light in a defined angle range. They homogenize irregular light distributions as well as local intensity peaks.

It is also possible to apply those diffusive microstructures directly into the plano side of all our plastic optics components.

Part Number	Symmetric Half Angle	Clear Aperture	Transmission

BP 321	± 2.8°	Ø 400.0	91 %
BP 336	± 3.9°	Ø 300.0	88 %
BP 302	± 4.0°	Ø 125.0	92 %
SN 1333	± 4.75°	232.0 x 232.0	92 %
BP 331	± 5.0°	Ø 300.0	87 %
BP 304	± 7.4°	Ø 200.0	89 %
SN 1334	± 7.8°	231.0 x 231.0	92 %

All dimensions in mm.
Focal lengths listed apply to 546nm in PMMA (max. tolerance ± 5%).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3.
Other dimensions or special trimmings can be realised upon request.
Special designs possible on request.

pdf-Version (pdf, 96 KB)

Microlens Arrays

Microlens arrays are one- or two dimensional periodic patterns of small lens structures (lens dimensions up to a few millimetres). We offer custom designs without limitations regarding the pattern in a wide range of microlens sizes and overall array dimensions.

It is possible to apply a microlens array directly into the plano side of all our polymer optical components.

Standard material is PMMA (other materials on request).
The outside size may be up to 5 - 20mm beyond the clear aperture.
The standard thickness is 1.8mm ± 0.3 (other thicknesses > 0.8 mm on request)

pdf-Version (pdf, 387 KB)