Optical Coloured Glass Filters by Isuzu Glass

In the new collaboration with Japanese manufacturer Isuzu Glass, Eureca offers a range of optical filters with a variety of spectral features. They are suitable for applications in optoelectronics, office automation, photography, lighting, medical technology and much more.

Each filter glass has its own spectral properties and is manufactured under strict quality control. The glass has a minimal amount of bubbles and streaks, is physically and chemically stable and resistant to aging. In combination with a multi-layer coating, these glasses offer a multitude of advantages.

IHU Series – UV transmitting filters
ITY Series – UV sharp cut filters
IUV Series – UV transmitting, Visible absorbing filters
ISK Series – Heat absorbing filters
IEC Series – Blue filters for Colour compensation
IEB Series – Blue filters
IVB Series – Blue filters
IVG Series – Green filters
ILA Series – Light balancing filters (to decrease)
ILB Series – Light balancing filter (to increase)
IND Series – Neutral density filters
IIR-SF Series – IR transmitting filters

Please note that all filters of each series are available on request in individual sizes and shapes.

IHU Series

These are shortwave absorption and UV transmission filters with the transmission cut-off wavelength in the ultraviolet range, which absorb light that is shorter than the set wavelength and allow it to transmit light longer than it. Some glass materials can be molded to make aspheric lenses, lens arrays and other ultraviolet rays.

Application: analyzers, photoreactive resins, etc.

Type	Similar Filter HOYA	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
IHU290		49	513	571	1.50	2.31	3	2.5±0.5	λT 290±7 nm Δλ < 40 TH ≥ 85 %
IHU310		94	533	542	1.52	2.55	3	2.5±0.5	λT 310±7 nm Δλ < 40 TH ≥ 85 %
IHU340	(UV34)	58	610	433	1.52	2.57	1	2.5±0.5	λT 340±7 nm Δλ < 40 TH ≥ 85 %
IHU350		74	534	610	1.52	2.45	2	2.5±0.5	λT 350±7 nm Δλ < 40 TH ≥ 85 %

Version: 10-29-2019

ITY Series

This glass filter has a steep slope to visible light compared to interference filters. In addition, it is less affected by the angle of incidence and effectively absorbs ultraviolet rays.

Application: LCD projectors (protects LCD panels).

Type	Similar Filter SCHOTT	Similar Filter HOYA	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
ITY385	(GG 385)	L-39	53	498	472	1.49	2.30	6	1.1±0.2	λT 50 % 385±3 nm TH ≥ 85 %
ITY418	GG 420	L-42	68.5	517	491	1.49	2.38	4	1.1±0.2	λT 50 % 418±3 nm TH ≥ 85 %
ITY425			68	529	512	1.50	2.40	4	1.1±0.2	λT 50 % 425±3 nm TH ≥ 85 %
ITY430			68	530	520	1.50	2.39	4	1.1±0.2	λT 50 % 430±3 nm TH ≥ 85 %

Version: 10-29-2019

IUV Series

With the rapid development of our information society, the use of light has expanded beyond the optical industry to other industries. For example, ultraviolet rays are increasingly used because of their higher energy level. For example, the IUV-365 filter absorbs optical wavelengths and passes the ultraviolet ranges from 330 nm to 400 nm. Isuzu Glass has the technology to vary the transmission characteristics of the glass filter by adjusting its density.

Type	Similar Filter SCHOTT	Similar Filter HOYA	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
IUV340	UG 11	U-340	59	600	493	1.53	2.64	2	1.0±0.2	λTmax 340±10 nm Tmax 83±5 %
IUV355			76	569	416	1.52	2.69	1	3.0±0.5	λTmax 355±5 nm Tmax 60±5 % 254 nm ≤ 0.1 % 405 nm ≤ 0.1 %
IUV360			99	572	561	1.53	2.60	3	2.5±0.5	λTmax 360±5 nm Tmax 86±5 %
IUV365			74	536	506	1.53	2.66	3	5.0±0.5	λTmax 365±5 nm Tmax 60±5 % 254 nm ≤ 0.1 % 405 nm ≤ 0.1 %

Version: 10-29-2019

ISK Series

This special glass has been designed to provide maximum transmission across the visible spectrum while minimizing transmission of infrared rays. Since this glass can transmit ultraviolet rays, it can be used as an ultraviolet filter (depending on the type of filter).

Application: Heat absorption filter, protection for YAG lasers, filters for medical purposes.

Type	Similar Filter SCHOTT	Similar Filter HOYA	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Optical Density OD @1064 nm	Transmittance
ISK150	KG 2	HA-50	66	560	497	1.52	2.60	1	3.0±0.5	≥ 2.3	λT 50 % 728±13 nm Tave λ 400–550 nm ≥ 84 %
ISK153			66	566	481	1.52	2.61	1	3.0±0.5	≥ 4.0	λT 50 % 703±13 nm Tave λ 400–550 nm ≥ 80 %
ISK157	KG 1	HA-30	66	566	481	1.52	2.61	1	3.0±0.5	≥ 3.5	λT 50 % 698±13 nm Tave λ 400–550 nm ≥ 80 %
ISK167	KG 3		65	597	502	1.52	2.64	1	3.0±0.5	≥ 5.0	λT 50 % 668±13 nm Tave λ 400–550 nm ≥ 78 %
ISK171	KG 5		64	595	517	1.53	2.63	1	3.0±0.5	≥ 6.0	λT 50 % 643±13 nm Tave λ 400–550 nm ≥ 70 %
ISK370	(KG 4)		67	553	482	1.51	2.58	1	3.0±0.5	≥ 1.2	λT 50 % 783±13 nm Tave λ 400–550 nm ≥ 87 %

Version: 10-29-2019

IEC Series

This glass has a good transmission in the range of blue to green and a sharp decline in the red region. It is used as an IR cut filter.

Application: Colour compensation for digital cameras and mobile phones with cameras.

Type	Similar Filter SCHOTT	Similar Filter HOYA	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
IEC501	BG 18		66	598	539	1.53	2.63	1	1.0±0.2	λT 50 % 592±5 nm 500 nm ≥ 77 %
IEC508	BG 38	(CAW-500) (CS-500)	94	432	489	1.53	2.64	2	1.0±0.2	λT 50 % 642±5 nm 500 nm ≥ 89 %
IEC518		C-500	69	565	531	1.53	2.66	1	1.0±0.2	λT 50 % 615±5 nm 500 nm ≥ 87 %
IEC578	BG 39	CM-500S	70	513	509	1.54	2.72	1	1.0±0.2	λT 50 % 604±5 nm 500 nm ≥ 85 %
IEC131K			135	421	387	1.51	2.59	2	1.0±0.2	400 nm ≥ 75 % 500 nm ≥ 85 % 600 nm ≥ 45 % 700 nm ≥ 12 %

Version: 10-29-2019

IEB Series

This glass has a good transmission in the range of purple to blue.

Application: wavelength selection filter, colour compensation.

Type	Similar Filter SCHOTT	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
IEB340	(BG 24)	58	623	537	n(1545 nm): 1.51	2.64	2	1.0±0.2	254 nm ≥ 78 % 356 nm ≥ 87 % 580 nm ≥ 15 %
IEB400	BG 25	105	469	559	n(1545 nm): 1.53	2.57	2	1.0±0.2	334 nm ≥ 74 % 405 nm ≥ 84 % 488 nm ≥ 38 % 725 nm ≥ 45 %
IEB470	(BG 23)	148	424	407	n(546 nm): 1.53	2.69	3	1.0±0.2	450 nm ≥ 84 % 633 nm ≥ 23 % 800 nm ≥ 8 %

Version: 10-29-2019

IVB Series

The IVB series is a bandpass filter for transmission in the blue range. They are designed to enhance contrast for black-and-white photography and to enable colour compensation.

Application: Black and white photography, colour compensation.

Type	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
IVB490	86	520	448	1.53	2.63	3	2.5±0.5	λTmax 490±5 nm Tmax 50±5 % 390 nm ≤ 1 % 640 nm ≤ 1 %

Version: 10-29-2019

IVG Series

Based on the wavelength of the green light region, this filter allows a comparatively narrow wavelength range. It helps to achieve the maximum transmission at the desired wavelength. Designed to provide high center-wavelength transmittance and maintain low transmission at unnecessary wavelength (below 400 nm and between 700 nm and 1000 nm).

Application: Green filter for RGB separation, wavelength selection, contrast enhancement in black and white photography.

Type	Similar Filter SCHOTT	Similar Filter HOYA	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
IVG530	VG 9	G-533	86	535	492	n(546 nm): 1.52	2.57	4	2.5±0.5	λTmax 530±5 nm Tmax 50±5 % 430 nm ≤ 1 % 650 nm ≤ 5 %
IVG540			86	535	495	n(546 nm): 1.52	2.58	3	2.5±0.5	λTmax 540±5 nm Tmax 45±5 % 430 nm ≤ 1 % 660 nm ≤ 5 %
IVG550		G-550	85	528	482	n(546 nm): 1.52	2.58	3	2.5±0.5	λTmax 550±5 nm Tmax 43±5 % 440 nm ≤ 1 % 680 nm ≤ 5 %

Version: 10-29-2019

ILA Series

Light balancing filters (amber) are used to lower the colour temperature and give the photographer a warmer color.

Type	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
ILA400	83	554	599	1.56	2.72	1	2.0±0.5	Light Balancing Change Ability 400±30 mired

Version: 10-29-2019

ILB Series

Light compensation filters (blue) are used to increase the colour temperature and allow the photographer to make slight changes to the colour quality of the illumination to become cooler (blue).

Type	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
ILB90	110	502	576	1.51	2.53	2	2.4±0.5	Light Balancing Change Ability −90±5 mired

Version: 10-29-2019

IND Series

This glass filter has been designed to ensure uniform spectral transmission across the visible spectrum. Isuzu Glass can also modify the desired densities.

Application: Adjustment of the amount of light entering a camera.

Type	Similar Filter SCHOTT	Similar Filter HOYA	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]	Transmittance
IND10	NG 3	ND-13	77	523	569	1.53	2.55	3	2.2±0.2	Tave λ400–700 10±2 %
IND30	NG 4	ND-25	79	532	571	1.52	2.55	2	2.2±0.2	Tave λ400–700 30±2 %
IND40		ND-40	85	536	566	1.52	2.54	3	2.2±0.2	Tave λ400–700 40±2 %
IND60	NG 5	ND-50	80	535	625	1.52	2.55	1	2.2±0.2	Tave λ400–700 60±2 %

Version: 10-29-2019

IIR-SF Series

The Isuzu chalcogenide glass (IIR-SF^®1) is a glass that consists mainly of sulfur and has good infrared transmission. This glass is especially useful for cameras and sensors that work up to 11 µm. Moreover, it is cheaper than, for example, germanium crystals, which are currently widely used.

Type	Therm. Charact. α100–300 (X 10–7/Â°C)	Therm. Charact. Tg (Â°C)	Hardness HK (kg/mmÂ²)	Refractive Index nd	Density d	Water Resistance Rw	Thickness [mm]
IIR-SF1	α100–200: 161	236	124	n(10.6 µm): 2.68	4.15	1	2.0±0.3
IIR-SF2	α100–200: 146	250	143	n(10.6 µm): 2.66	4.13	1	2.0±0.3

Version: 10-29-2019

The proven, state-of-the-art press forming technology enables mass production from simple to complex shapes. Many of them can not be made with conventional polishing techniques. For every application, Isuzu Glass can meet your size, thickness and configuration requirements.

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Last update: 2019-21-11

Optical Coloured Glass Filters by Isuzu Glass

IHU Series

ITY Series

IUV Series

ISK Series

IEC Series

IEB Series

IVB Series

IVG Series

ILA Series

ILB Series

IND Series

IIR-SF Series

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