Basler Lens C23-3520-2M-S#
Key Features#
- Fits all Basler cameras with a sensor size of up to 2/3"
- Metal housing
- C-mount
- Locking screws for iris and focus
Info
The technical data shown in the following sections are nominal design values. The real values of the delivered products can deviate from the nominal design values.
General Specifications#
| C23-3520-2M-S | |
|---|---|
| Order Number | 2200000182 |
| Focal Length f' | 34.3 mm ± 5 % |
| Aperture Range | F2.0–F16 |
| Image Circle | 11 mm (2/3" format) |
| Focus Range | 0.35 m to infinity |
| Optimum Working Distance | 1.0 m |
| Optimum Magnification | -0.035 |
| Relative Illumination at Full Aperture | At least 84 % (see Relative Illumination versus Image Height) |
| Resolution (25 % MTF, Center, Full Aperture) | Designed for 90 LP/mm (5.5 µm pixel size, see Resolution versus Image Height) |
| Optical Distortion | Typical -0.5 % (barrel distortion, see Distortion versus Image Height) |
| Angle of View, 1/1.8" Format (using an IMX265 sensor) | Horizontal: 10.6° (@ MOD) to 11.7° Vertical: 8.0° (@ MOD) to 8.8° |
| Angle of View, 2/3" Format (using a PYTHON 2000 sensor) | Horizontal: 13.6° (@ MOD) to 15.1° Vertical: 8.6° (@ MOD) to 9.5° |
| Wavelength Range | Visible (400–700 nm) |
| Pupil Magnification, ß'P | 1.03 |
| Chief Ray Angle, CRA | 8.61° |
| Front Focal Length, sF | -11.1 mm |
| Back Focal Length, s'F | 10.1 mm |
| Principal Point Separation, HH' | -14.4 mm |
| Entrance Pupil Position, sEP | 22.2 mm |
| Exit Pupil Position, s'AP | -24.7 mm |
| Overall Optical Length, d | 32.5 mm |
→ See Terminology (Basler Lenses).
Mechanical Specifications#
| C23-3520-2M-S | |
|---|---|
| Flange Back | 17.526 mm |
| Mount | C-mount |
| Weight | Approx. 81 g |
| Focus/Iris Operation | Manual Operating angle: 262° |
Lens Dimensions#
→ Download the CAD/technical drawing for your Basler Lens.
Precautions, Mounting, and Cleaning (Basler Lenses)#
→ See Precautions, Mounting, and Cleaning (Basler Lenses).
Environmental Requirements#
| Temperature During Operation | -10–60 °C (14–140 °F) (For best results, adjust the focus when a steady operating temperature has been reached.) |
| Humidity During Operation | 20–80 % relative humidity, non-condensing |
| Temperature During Storage | -20–70 °C (-4–158 °F) |
| Humidity During Storage | 20–70 % relative humidity, non-condensing |
Performance Charts#
Relative Illumination versus Image Height#
Distortion versus Image Height#
Resolution versus Image Height#
Conditions: f/2.0, polychromatic, 0.5 m working distance, average result based on 10 samples
