Off-Axis Optical Precision And Structure
The FP-2000L-300 Off-Axis Parabolic Collimator provides high-quality, unobstructed parallel beams through a 2000 mm focal system and Φ300 mm clear aperture. Its off-axis mirror design eliminates central obstruction, minimizing stray light and secondary reflections. The primary quartz mirror and planar secondary reflector deliver ≤5″ beam parallelism and RMS ≤ 1/40λ @ 632.8 nm surface precision. The system supports visible, infrared, and laser wavelengths, ensuring unmatched alignment accuracy for imaging, optical axis testing, and infinite-target simulation.
High-Performance Reflective And Lens Collimator Components
The optical system employs a quartz-glass main mirror with aluminum + Si coating (optional gold, silver, or dielectric finishes). Its lens collimator performance covers 380 – 780 nm, ensuring ≥ 85 % reflectivity and minimal aberration (≤ λ/20 on-axis). The mechanical structure uses a rigid rectangular frame to maintain thermal stability, while the focal surface design allows interchangeable reticle mounts for multi-parameter optical evaluation.
Integrated Testing Flexibility And Modular Design
Equipped with visible and infrared reticles, neutral attenuators, filters, and a motorized target wheel, the system operates as a modular rectangular collimator for optical, infrared, and laser measurement. Optional components such as four-bar, circular, and slit targets enable MRTD, MDTD, and SRF testing, while star-point and resolution plates support fine optical calibration. Each module ensures precise light control for image quality testing, thermal imager analysis, and optical system characterization.
Product Advantages
Exceptional Beam Uniformity And Resolution
Each Parabolic Collimator is engineered to maintain ≤ 5″ beam parallelism and RMS ≥ 1/15λ wavefront quality. The off-axis layout prevents optical path interference, ensuring an unobstructed aperture and consistent illumination for high-precision image calibration and axis alignment.
Enhanced Reflectivity And Material Durability
The primary mirror surface achieves RMS ≤ 1/40λ accuracy and ≥ 85 % reflectivity, while the protective coating ensures resistance to oxidation and wavelength drift. The lens collimator components maintain consistent performance across visible and infrared ranges, guaranteeing superior imaging fidelity and extended operational life.
Professional Engineering By A Trusted Collimator Manufacture
As a specialized collimator manufacture, YuLing Technology applies precision machining and interferometric testing for each optical element. The system’s modular assembly allows fast reticle replacement and integration with custom targets, supporting both standard and infrared optical projects with dependable repeatability.
Optical path diagram：
- The main reflector adopts an off-axis surface mirror, select the appropriate off-axis, so that the reflected optical path deviates from the optical axis, avoids the secondary reflector from interfering with the light-passing optical path, and ensure that the φ300mm light-permeable area is unobstructed.
- The secondary mirror adopts a plane reflector, which undertakes the reflected light path of the main reflector and turns the light path, so that the reflected light path is located on the side of the light outlet, which is convenient for later debugging and use.
- The focal plane position is the target surface installation position. Each target plate is installed in the dividing plate frame separately. Through later debugging, each target plate is placed in the focal surface position after separate assembly to realize the target plate replacement function.
Standard Components:
- Collimator Main Unit: 1 set
- Filters: 2 pieces (Orange, center wavelength 600nm; Green, center wavelength 532nm)
- Attenuator: 1 piece (Neutral Attenuator 430–730nm) Visible Reticles: 12 pieces(Crosshair Reticles*1,Resolution Reticles*5:1#/2#/3#/4#/5#,Star Point Reticles*5: 0.1/0.2/0.01/0.02/0.05,Porro Board*1)
- USAF 1951 Resolution Reticle: 1 piece
- Light Source Assembly: 1 set( 12V30W Halogen Light Source)
- Motorized Target Wheel: 1 set (8 positions)
Custom Components (Applicable to Infrared Reticles):
Infrared targets are formed by machining various patterns into thin metal plates. When illuminated by a blackbody source, the thermal imager under test observes sharp target patterns against a uniform background. A variety of standard infrared targets are available for customization.
Examples of Targets:
- Four-Bar Target: For Minimum Resolvable Temperature Difference (MRTD) testing.
- Circular Target: For Minimum Detectable Temperature Difference (MDTD) testing.
- Slit Target: For Slit Response Function (SRF) testing.
- Cross-Circle Target: For axis alignment, aiming, and focusing.
- Distortion Target: For testing camera distortion in image generation.
- Outline Target: For evaluating target recognition range of the camera under test.
- Square Target: For testing Noise Equivalent Temperature Difference (NETD), Fixed Pattern Noise (FPN), Signal Transfer Function (SITF), and Aperiodic Transfer Function (ATF).
External dimensions:（Unit: mm）
About Us
YuLing Technology, based in Chongqing, China, specializes in high-precision optical and photoelectric testing instruments. With a dedicated R&D center in Xi’an, the company designs and manufactures collimators, autocollimators, optical benches, and calibration systems. YuLing serves industries such as aerospace, defense, and industrial metrology, combining optical design, precision mechanics, and control integration. Committed to technical accuracy and reliability, YuLing provides both standard and custom optical solutions backed by comprehensive support and international-level quality assurance.Request detailed specifications or tailored optical configurations from YuLing today!
FAQ – Frequently Asked Questions
What precision level does the FP-2000L-300 Parabolic Collimator achieve?
It delivers ≤ 5″ beam parallelism and ≤ λ/20 on-axis wavefront accuracy verified through interferometric calibration.
Can the mirror or coating be customized?
Yes, aluminum + Si is standard, with optional gold, silver, or dielectric coatings for wavelength-specific applications.
Is the rectangular collimator compatible with infrared testing?
The system supports both visible and infrared wavelengths, enabling MRTD, MDTD, and SRF target evaluations.
What accessories are included in the base configuration?
Each unit includes filters, attenuators, visible reticles, a halogen light source, and an eight-position motorized target wheel.
Does YuLing provide ongoing maintenance or calibration support?
Yes, YuLing offers recalibration, optical alignment, and component replacement services to maintain long-term precision.
