Ultraviolet Transmitting, Visible Absorbing Filters (U)

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Professional Ultraviolet Transmitting, Visible Absorbing Filters - U Series

HOYA Candeo U-Series ultraviolet transmitting filters provide precise UV wavelength transmission control while blocking visible light for professional imaging, scientific research, and industrial applications. These filters selectively transmit ultraviolet light while absorbing visible wavelengths, making them ideal for fluorescence microscopy, UV photography, spectroscopy, and optical analysis.

Key Features:

  • High-precision UV wavelength transmission control
  • Professional-grade optical quality
  • Standard 50×50mm square format
  • 2.5-3.25mm thickness for enhanced durability
  • Selective UV light transmission with visible light blocking
  • Ideal for fluorescence microscopy, UV photography, and spectroscopy

Available Series:

  • U330: UV transmitting filter with Tmax 85±5%, T254>40%, T405<15%
  • U340: UV transmitting filter with Tmax 75±5%, T254<1.0%, T405<0.1%
  • U360: UV transmitting filter with Tmax 70±5%, T254<0.01%, T405<1.0%
  • UL254S: UV transmitting filter with T254≥70%, T310≥85%, T365≥83%
  • UL365S: UV transmitting filter with T365≥73%, T405≤7%, T694≤3%, T750≤45%
  • U340A: UV transmitting filter with Tmax 75±5%, T254<1%, T405<0.1%

Technical Specifications

U330, U340, U360 Series

Item Standard Value Color specification
(Standard illuminants A)		 Thickness Refractive Index Chemical property Thermal properties Mechanical properties Specific gravity
Tmax
(%)		 T254
(%)		 T405
(%)		 x y mm 600nm DW DA Tg Ts α
-30/70		 α
100/300		 HK FA d
U330 85±5 >40 <15 – – 2.50 1.552 4 5 470 505 82 93 420 230 2.78
U340 75±5 <1.0 <0.1 – – 2.50 1.571 4 4 530 565 85 96 430 250 2.92
U360 70±5 <0.01 <1.0 – – 2.50 1.537 3 2 520 560 100 111 560 140 2.74

UL254S Series

Item Standard Value Color specification
(Standard illuminants A)		 Thickness Refractive Index Chemical property Thermal properties Mechanical properties Specific gravity
T254
(%)		 T310
(%)		 T365
(%)		 x y mm 600nm DW DA Tg Ts α
-30/70		 α
100/300		 HK FA d
UL254S ≥70 ≥85 ≥83 – – 2.5 1.551 4 3 450 500 93 65 380 220 2.89

UL365S Series

Item Standard Value Color specification
(Standard illuminants A)		 Thickness Refractive Index Chemical property Thermal properties Mechanical properties Specific gravity
T365
(%)		 T405
(%)		 T694
(%)		 T750
(%)		 x y mm 600nm DW DA Tg Ts α
-30/70		 α
100/300		 HK FA d
UL365S ≥73 ≤7 ≤3 ≤45 – – 3.25 1.532 1 1 527 687 – 88 490 100 2.61

U340A Series

Item Standard Value Color specification
(Standard illuminants A)		 Thickness Refractive Index Chemical property Thermal properties Mechanical properties Specific gravity
Tmax
(%)		 T254
(%)		 T405
(%)		 x y mm 600nm DW DA Tg Ts α
-30/70		 α
100/300		 HK FA d
U340A 75±5 <1 <0.1 – – 2.5 1.565 1 1 609 643 67 80 430 170 2.98

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