Focusing Target Projector Types and Specifications
The FTP provides a convenient means of placing a virtual standard target over a wide range of apparent object distances in a compact space for the purpose of performing MTF testing of small cameras. This functionality enables the test engineer to perform testing over a range of conjugates and to perform through-focus resolution testing of fixed-focus cameras in a compact space. Our patented drive scheme (patent numbers 11089292, 11689711) enables us to achieve a high degree of straightness of travel of the center of the projected target, and linear output encoders ensure accurate positioning of the target. All units are factory aligned and calibrated and all calibration information is stored in the device, which means that an FTP can be plugged in and used right away.
FTPs are available with different focal lengths and clear apertures to accommodate DUTs of different sizes and with varying object distance and working distance requirements. Standard FTP configurations have an orthogonal, low contrast, crossedge targets, but custom target options are available. FTPs can be assembled with white LEDs sources of different color temperatures, or with narrowband visible or NIR LEDs.
When sold individually, FTPs are usually shipped with the following accessories:
- USB Interface box and 12VDC power adapter for establishing RS-485 + power bus
- USB Cable for computer connection
- 3-Meter long power + RS-485 bus cable from FTP to interface box
- Benchtop cradle stand
- Thumb drive with demo control application for setting brightness and object distance, manual, and instruction set documentation
- Storage case
| Focusing Target Projector Specifications | |||||
| FTP Type | FTP-018 | FTP-039 | FTP-064 | FTP-102 | FTP-153 |
| Nominal Focal Length (mm) | 18 | 39 | 64 | 102 | 153 |
| Clear Aperture (mm) | 8 | 14 | 23 | 23 | 38 |
| Standard Target Pattern Diameter (mm) | 4 | 5 | 8 | 10 | 10 |
| Standard Target Contrast Ratio | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 |
| Standard Target Diameter when Collimated when collimated (°) | 12.6 | 7.3 | 7.1 | 5.6 | 3.7 |
| Closest Virtual Object Distance (m)
w.r.t. FTP forward flange |
0.025 | 0.05 | 0.35 | 0.80 | 1.70 |
| Closest Real Object Distance (m)
w.r.t FTP forward flange |
-0.10 | -0.30 | -0.60 | -1.20 | -2.50 |
| Maximum Time to Traverse Entire Adjustment Range (s) | 5 | 5 | 5 | 5 | 5 |
| Maximum Infinity Boresight Deviation of Target Center (°)
w.r.t. FTP mounting features |
0.04 | 0.04 | 0.02 | 0.01 | 0.01 |
| Uncertainty in reticle location
w.r.t. objective lens focal plane (mm) |
±0.012 | ±0.012 | ±0.015 | ±0.020 | ±0.020 |
| Maximum Deviation of Target Edge from Notch in Mounting Flange (°) | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| LED Source Color Options | White LED (3000K, 3500K, 4000K, 4500K (standard), 5000K, 5700K, 6500K), 940nm IR LED | ||||
| Source lifetime | 50,000 hours @ 50% | ||||
| Interface bus | R485 (9600 Baud), 12 VDC | ||||
| Power Supply Input Voltage | 100 to 240 VDC | ||||
| Operating Temperature | 10-30°C | ||||
| Operating Humidity | 30-70° C non-condensing | ||||
All specifications subject to change.
Custom options available – contact sales@optikos.com for more information.
FTPs can be provided as standalone target projectors, as part of a Meridian Starfield system or as part of a Meridian FLEX. Optikos product engineers are available to discuss your requirements and configure an appropriate solution for your unique metrology needs.
