Hamamatsu J11 Series Fiber Optic Plate (FOP)

Overview

Hamamatsu J11 Series Fiber Optic Plates (FOPs) are monolithic, coherent optical components fabricated from precisely aligned hexagonal arrays of fused silica or radiation-shielded glass fibers. Unlike conventional refractive optics, FOPs operate on the principle of total internal reflection (TIR) within individual micro-fibers—enabling direct, distortion-free, one-to-one pixel mapping between input and output faces without focal length constraints. This intrinsic telecentricity and zero-aberration light transfer make J11 FOPs essential for high-fidelity image coupling in space-constrained optical systems, including X-ray imaging detectors, electron microscopy viewports, scintillator-to-sensor interfaces, and vacuum-compatible diagnostic instrumentation. Each plate is engineered with strict control over fiber pitch, cladding thickness, and inter-fiber spacing to ensure >95% optical coupling efficiency and minimal crosstalk across the visible to near-UV spectrum (350–700 nm). The J11 platform supports both standard-grade and radiation-hardened configurations, with lead-doped variants (J11057 series) meeting IEC 61331-1 requirements for diagnostic X-ray shielding.

Key Features

• Coherent fiber architecture ensuring pixel-wise image fidelity and spatial resolution up to 102 line pairs per millimeter (lp/mm)
• Fixed 3.0 mm thickness across all standard configurations—optimized for mechanical stability and thermal uniformity in vacuum or cryogenic environments
• X-ray shielding capability via lead-oxide-doped glass matrix (J11057 series), attenuating diagnostic-range X-rays (40–120 kVp) by ≥90% at 3 mm thickness
• Low numerical aperture (NA) variant (J12221 series) with 28.5 lp/mm resolution for enhanced depth-of-field coupling in collimated beam applications
• Hermetically sealed, non-hygroscopic surface finish—compatible with cleanroom Class 100 handling and solvent-based optical bonding (e.g., NOA61, UV-curable epoxies)
• OEM-ready geometry options: rectangular (30 × 20 mm, 50 × 50 mm, 100 × 100 mm) and circular (Ø26.5 mm) active areas

Sample Compatibility & Compliance

J11 FOPs are designed for integration into regulated analytical and medical imaging platforms. Their material composition complies with RoHS Directive 2011/65/EU and REACH Annex XVII restrictions on heavy metals (excluding intentional lead content in J11057 variants, which conforms to IEC 61331-1 Annex B exemptions). The lead-doped plates meet ISO 13485:2016 design control requirements for Class IIa medical device components when used in X-ray image intensifiers or flat-panel detector assemblies. All variants undergo 100% visual inspection under 100× dark-field microscopy and spectral transmittance verification per ISO 9050:2003. Batch traceability includes full material certification (Mill Test Report), dimensional metrology (CMM validated ±1 µm tolerance), and resolution verification via USAF 1951 target imaging per ASTM E1316 Standard Terminology for Nondestructive Examinations.

Software & Data Management

While J11 FOPs are passive optical elements requiring no firmware or embedded software, Hamamatsu provides comprehensive integration documentation—including angular acceptance charts, MTF curves (measured at 546 nm), and thermal expansion coefficients (α = 5.2 × 10⁻⁶ /°C)—in standardized PDF and CSV formats compatible with optical design suites (Zemax OpticStudio, CODE V, FRED). For GxP-regulated environments, Hamamatsu supplies a Device Master Record (DMR) package containing design history file (DHF) excerpts, risk analysis (ISO 14971:2019), and calibration traceability to NIST-traceable photometric standards. Audit-ready documentation supports FDA 21 CFR Part 11 compliance when archived within validated electronic quality management systems (eQMS).

Applications

• Coupling scintillation crystals (e.g., CsI:Tl, GAGG:Ce) to CCD/CMOS sensors in radiography and fluoroscopy detectors
• Vacuum-tight optical windows in scanning electron microscope (SEM) and focused ion beam (FIB) chamber viewports
• Image relay in compact endoscopic and laparoscopic imaging systems requiring sub-millimeter form factor
• Beam homogenization and spatial filtering in laser-induced breakdown spectroscopy (LIBS) sample chambers
• Neutron/gamma discrimination layers in hybrid radiation detection stacks using dual-phase scintillators
• Alignment reference substrates in interferometric metrology fixtures due to inherent flatness (λ/10 @ 633 nm)

FAQ

What is the maximum operating temperature for J11 FOPs?
Standard J11 plates are rated for continuous operation from –40 °C to +80 °C; lead-doped variants (J11057) maintain structural integrity up to +60 °C due to glass transition temperature limitations.
Can J11 FOPs be coated with anti-reflective (AR) films?
Yes—Hamamatsu offers optional MgF₂ or multi-layer dielectric AR coatings (R < 0.5% @ 550 nm) applied via ion-assisted e-beam evaporation; coating compatibility must be specified at time of order.
Is there a difference in resolution measurement methodology between 102 lp/mm and 28.5 lp/mm variants?
Both are measured per ISO 12233:2017 using slanted-edge MTF analysis; the lower resolution in J12221 series results from increased cladding-to-core ratio, not measurement variance.
Do J11 FOPs require periodic recalibration?
No—being passive, solid-state components, they exhibit no drift; however, periodic visual inspection per ASTM E2861 is recommended for mission-critical imaging paths.
Are custom dimensions or thicknesses available beyond the standard 3.0 mm?
Custom thicknesses (2.0–5.0 mm) and non-standard geometries (e.g., trapezoidal, stepped profiles) are available under Hamamatsu’s OEM engineering support program (lead time: 12–16 weeks).