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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

    Productlines

    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.

    Negative Fresnel Lenses

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

    SC 2135 neg-764.00.508infinite-764.0436.3

    Part Number

    Focal Length

    Facet Spacing

    Fresnel Conjugate

    Plano Conjugate

    Clear Aperture
    SC 259 neg-18.30.254infinite-18.316.6
    SC 239 neg-102.80.508infinite-102.8139.4
    SC 902 neg-129.60.254infinite-129.6230.1
    DC 1100L neg-185.80.508infinite-185.8269.0
    DC 427L neg-205.70.508infinite-205.7302.0
    DC 434U neg-255.30.508infinite-255.3302.0
    SC 973 neg-508.00.508infinite-508.0408.7
    • 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.

    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

    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.

    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

    1369.4 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.

    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

    1142.6 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.

    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.

    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.

    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 200.089 %

    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.