Seoul Precision Optics

It is manufactured based on a hard dielectric coating, with high refractive materials such as TiO2 and Nb2O5 typically used. Since it is applied through a reactive process, it can be used across the entire spectrum from UV to NIR. Additionally, due to its precise refractive index control and high density, it is suitable for optical filters with high transmittance and no band shifting at room temperature. High peak transmission, Deep blocking over wide spectral ranges, Hard dielectric coating There is no thickness error in the thin film, and it can consistently achieve a transmittance of over 90%. Size Tolerance :+0.0mm,- 0.2mm
Thickness : 1.0mm(nominal) to 10.0mm 
Surface /Coating Quality : F/F PER MIL-F-48616
Blocking (spectral)
Typically, 0.01%, O.D 4
※ Blocking specification can be design by customer
 

BP	206	12	12
Filter Code	CWL	FWHM	Size(A: 12.5mm B: 25.4mm C: 50.0mm

 

Item	CWL	FWHM	T peak	Filter Number
	(lo)(nm)	(nm)	%	A:12.5mm B:25.4mm C:50.0mm
NBPF-1.940–050	800 ± 2	12 ± 2	45	BP-800-12-	A	B	C
NBPF-2.700-060	800 ± 3.5	25 ± 3.5	45	BP-800-25-	A	B	C
NBPF-2.820-180	800 ± 6	40 ± 8	45	BP-800-40-	A	B	C
NBPF-3.090-160	800 ± 10	70 ± 30	45	BP-800-70-	A	B	C
NBPF-3.300-160	810 ± 2	12 ± 2	45	BP-810-12-	A	B	C
NBPF-3.295-160	820 ± 2	12 ± 2	45	BP-820-12-	A	B	C
NBPF-3.330-160	830 ± 2	12 ± 2	45	BP-830-12-	A	B	C
NBPF-3.310-160	840 ± 2	12 ± 2	45	BP-840-13-	A	B	C
NBPF-3.375-190	850 ± 2	12 ± 2	45	BP-850-13-	A	B	C
NBPF-3.387-190	850 ± 3.5	25 ± 3.5	45	BP-850-25-	A	B	C
NBPF-3.400-120	850 ± 6	40 ± 8	45	BP-850-40-	A	B	C
NBPF-3.435-160	850 ± 10	70 ± 30	45	BP-850-70-	A	B	C
NBPF-3.460-163	860 ± 2	13 ± 2	45	BP-860-13-	A	B	C
NBPF-3.950-090	870 ± 6	40 ± 8	45	BP-870-40-	A	B	C
NBPF-4.260-090	870 ± 2	13 ± 2	45	BP-870-13-	A	B	C
NBPF-4.260-180	880 ± 2	14 ± 2	45	BP-880-14-	A	B	C
NBPF-4.300-600	890 ± 2	14 ± 2	45	BP-890-14-	A	B	C

 

Infrared pass filter allows infrared light of a specific wavelength range to pass through while blocking other wavelength ranges. It is designed to transmit wavelengths longer than a specified 5% cutoff wavelength and block wavelengths shorter than this cutoff. This effectively reduces noise generated at shorter wavelengths, thereby enhancing the precision of thermal detection. Typically used in motion and intrusion sensors, the filter is available in various sizes based on customer requirements. To minimize noise, it is designed to have a blocking performance of less than 0.1% on average and less than 1% in absolute terms. Industrial temperature measurement, continuous temperature control for manufacturing, security systems, thermal detection sensor, etc.
  To reduce noise, most infrared light below a 5µm wavelength is blocked. The filter has high transmission in the 7.5–14µm wavelength range to optimize sensor sensitivity.


 

Item	Cut on(um)	Transmittance		Blocking
	Tr.(5%)	Range(um)	Averge(%)	Range(um)	Averge(%)
IR LWP-3.5	3.5	4~6.0	≥ 80	~3.0	≤ 0.1
IR LWP-5.0	5	7.5~13.0	≥ 75	~4.0	≤ 0.1
IR LWP-5.5	5.5	7.5~13.0	≥ 75	~4.5	≤ 0.1
IR LWP-6.6	6.6	7.5~13.0	≥ 75	~6.0	≤ 0.1
IR LWP-7.7	7.7	8.0~13.0	≥ 75	~6.5	≤ 0.1
IR LWP-8.0	8	9.0~13.0	≥ 75	~7.0	≤ 0.1

Infrared Band Pass Filter is designed to detect gases in the atmosphere. Gases such as CO2, H2O, and HC have absorption bands in the infrared spectrum. The Band Pass Filter is designed to only allow the wavelength ranges where absorption occurs to pass through. It is specifically designed to accept only the narrow absorption bands of gases, enabling the monitoring and measurement of gas concentrations. Industrial Gas Measurement, NDIR Gas Sensing, CO2 detection Sensors, etc. Based on infrared (IR) absorption, the product can be designed and manufactured for all infrared wavelength ranges. Typically, the filter has a line width between 90nm and 200nm, but wider ranges can also be implemented depending on the product's specifications.


 

Item	CWL(λ0)	HBW (λ1~λ2)	T (peak)	Blocking  Range(um)	Gas Info
NBPF-1.940–050	1.940±30nm	50±20nm	73%	1.50 ~ 10.00	H2O
NBPF-2.700-060	2.700±30nm	60~100nm	73%	1.50 ~ 4.00	H2O
NBPF-2.820-180	2.820±1.0%	180±20nm	70%	1.50 ~ 10.0
NBPF-3.090-160	3.090±30nm	160±20nm	73%	1.50 ~ 10.00	HC
NBPF-3.300-160	3.300±30nm	160±20nm	73%	1.50 ~ 10.00	CH4
NBPF-3.295-160	3.295±30nm	160±20nm	73%	1.50 ~ 10.00	HC
NBPF-3.330-160	3.330±30nm	160±20nm	73%	1.50 ~ 10.00	HC / CH4
NBPF-3.310-160	3.310±30nm	160±20nm	73%	1.50 ~ 10.00	HC
NBPF-3.375-190	3.375±30nm	190±20nm	73%	1.50 ~ 10.00	HC
NBPF-3.387-190	3.387±30nm	190±20nm	73%	1.50 ~ 10.00	HC
NBPF-3.400-120	3.400±30nm	120±20nm	73%	1.50 ~ 10.00	HC
NBPF-3.435-160	3.435±30nm	160±20nm	73%	1.50 ~ 10.00	HC
NBPF-3.460-163	3.460±30nm	163±20nm	73%	1.50 ~ 10.00	HC / CH4
NBPF-3.950-090	3.950±30nm	90±20nm	73%	1.50 ~ 10.00	Reference
NBPF-4.260-090	4.260±30nm	90±20nm	73%	1.50 ~ 10.00	CO2(narrow)
NBPF-4.260-180	4.26±30nm	180±20nm	73%	1.50 ~ 10.00	CO2(standard)
NBPF-4.300-600	4.30±30nm	600±30nm	73%	1.50 ~ 10.00	Flame
NBPF-4.330-160	4.330±30nm	160±20nm	73%	1.50 ~ 10.00	CO2
NBPF-4.430-060	4.430±30nm	60±20nm	73%	1.50 ~ 10.00	Flame
NBPF-4.480-620	4.480±30nm	4.17 ~ 4.79um	73%	1.50 ~ 10.00	CO+CO2
NBPF-4.530-085	4.530±30nm	85±20nm	73%	1.50 ~ 10.00	N2O
NBPF-4.640-180	4.640±30nm	180±20nm	73%	1.50 ~ 10.00	CO
NBPF-5.300-180	5.300±50nm	180±30nm	73%	1.50 ~ 10.00	NOX
NBPF-6.235-200	6.235±50nm	200±30nm	73%	1.50 ~ 10.00	NO2
NBPF-7.300-180	7.300±50nm	180±30nm	70%	1.50 ~ 10.00	SO2
NBPF-8.300-250	8.300±50nm	250±30nm	70%	1.50 ~ 10.50
NBPF-9.076-115	9.076±50nm	115±30nm	70%	1.50 ~ 11.50	CH2F2
NBPF-9.378-393	9.378±50nm	393±30nm	70%	1.50 ~ 12.00	CH3F
NBPF-10.10-200	10.10±50nm	200±30nm	70%	1.50 ~ 12.50	C5F8
NBPF-10.27-210	10.27±50nm	210±30nm	70%	1.50 ~ 13.00	FREON R134a
NBPF-10.56-370	10.56±50nm	370±30nm	70%	1.50 ~ 13.50	SF6
NBPF-11.30-200	11.30±50nm	200±30nm	70%	1.50 ~ 14.00	FERON R12
NBPF-12.40-180	12.40±50nm	180±30nm	70%	1.50 ~ 15.50

Infrared anti-reflection filter plays a crucial role in optimizing infrared transmission and enhancing the performance of various optical systems and devices. It is commonly used in a wide range of applications, including imaging systems, sensors, and optical instruments, to optimize the efficiency of infrared transmission. Infrared thermal cameras, night vision devices, optical instruments with minimal optical loss, etc. Infrared anti-reflection filter is typically implemented in the 3–5µm and 7.5–13.5µm wavelength ranges, but it can be freely designed for any infrared range depending on the application. It can also be applied to infrared windows with surface hardening treatments such as DLC on the opposite side.

Item	Substrate	Transmittance
		Range(um)	Averge(%)
IRAR2.0	Silicon	2.0~14.0	≥74
IRAR3.0	Silicon	3.0~13.5	≥74
	Germanium	3.5~5.0	≥95
IRAR5.5	Silicon	5.5~12.0	≥72
IRAR8.0	Silicon	8.0-14.0	≥78
	Germanium		≥95

It is designed to use an infrared window for a hermetically sealed detector through edge metallization. The metallization of the window may consist of Gold, Chromium, Nickel, Platinum, etc. Hermetically sealed detector, IR detector and thermal imaging cameras, etc. It can be applied to Silicon, Ge, and Sapphire windows using the PVD process system, and because the Down Sputter process is applied, it can be metalized with good durability to the side and can be applied to AR coating.

Substrate
	Metallization	Size	Applicable Optical Coating
Germanium	Ti / Pt / Au Cr / Ni / Au	~ Dia 60	Infrared optical coating (AR Coating / Band Pass Filter)
Silicon
Sapphire

DLC coating is a technology that coats the product surface with carbon, the main component of diamonds, in a high-vacuum environment, using PVD or CVD methods. This coating can be used to create a high-hardness window, which can be applied to products that require high durability and temperature sensing. IR thermal detector, Mobile Phone and etc.
  It is applied to the 3-5 um area and the 7-14 um area, and can be used with a dielectric and can create the characteristics of a window with durability of 800Hv or more.

Property	Diamond
		DLC	Graphite
Density (g/cm3)	3.51	1.8~3.6	2.26
Hardness (kgf/mm2)	10,000	2,000~8,000	500
Coefficient of Friction	0.05	0.03~0.2	0.1
Refractive Index	2.42	1.8~2.6	2.15~1.8
Light Transparency	UV~IR	VIS~IR	Opaque
Resistance (W cm)	>1016	1010~1013	0.2~0.4

Adhesion	MIL-C-48497A 4.5.3.1 / Tape TEST
Humidity	MIL-C-48797A 4.5.3.2 / 24hrs. 49℃, 95~100%, relative humidity
Abrasion	TS 1888 / 10,000 wipes with wind screen wiper in water/sand slurry
Salt Spray	MIL-C-675C 4.5.9 / 24hrs, salt spray fog exposure
Salt Solution	MIL-C-48497A 4.5.5.2 / 24hrs, immersion in salt water

Item	Substrate
		Range(um)Averge(%)
DLC	Germanium	8.0 ~14um > 90%
	Silicon

 

Item	N/mm²	Gpa	Hv
Hardness with optical coating and DLC	9867.48	9.87	967.01
	8789.72	8.79	861.39
	8637.31	8.64	846.46