Yulong Optoelectronics
Yulong Optoelectronics (Optolong) is a 1999-founded Kunming-based manufacturer of precision optical filters serving amateur and professional astrophotographers, fluorescence microscopy labs, and industrial OEM clients globally through 30+ country dealer network.
- Company typePrivate
- Founded1999
- HeadquartersKunming, China
- Headcount51–100
- GTM typeB2B and B2C
- OfferingHardware or Manufacturing
What Yulong Optoelectronics does
Yulong Optoelectronics (Kunming Yulong Optoelectronics Technology Co., Ltd., dba Optolong) is a privately held Chinese specialty optical filter manufacturer founded in 1999 in Kunming, Yunnan Province. The company designs and produces precision interference filters for three primary segments: amateur and professional astrophotography (its flagship category), fluorescence microscopy and life sciences, and OEM/custom industrial and machine vision applications. Its core technology stack is built around optical thin-film coating, including electron beam evaporation (E-Beam Gun), ion-assisted deposition (IAD), precision double-sided polishing achieving substrate parallelism better than 30 arcseconds, and film thickness control within ±0.1nm, supported by an OPTOLONG OTFC-1300 coating machine installed in 2020.
The product portfolio spans roughly 28 SKUs across five categories: star-field filters (L-Pro, Clear Sky), deep-sky filters (L-Ultimate 3nm, L-Para 10nm, L-eNhance, L-Quad Enhance, SHO sets, LRGB, UHC, CLS, CLS-CCD, O-III, H-Beta), planetary filter sets, camera-specific built-in filters for Canon EOS-R, Sony magnetic, and Nikon Z mounts, and fluorescence filter sets supporting standard fluorophores (DAPI, FITC, TRITC, Cy3, Cy5, etc.). Pricing is positioned in the mid-premium hobbyist range (e.g., L-Ultimate 2-inch ¥2,580 CNY; L-Pro Sony ¥1,350 CNY).
The business operates a hybrid go-to-market: direct-to-consumer via the official Taobao flagship store and international website, a global dealer network spanning 30+ countries, and OEM/custom manufacturing for industrial and scientific clients. Marketing is community-driven through astrophotography competitions (Starryscape Dream), star parties, partnerships with the Yunnan Amateur Astronomers Association and CAS Yunnan Observatories, plus technical content on WeChat and the bbs.imufu.cn user forum. The company is ISO 9001:2015, RoHS, SGS, and CTI certified, holds the OPTOLONG trademark in both the US and China, and operates a 2,000+ sqm factory with approximately 60 employees.
Yulong Optoelectronics firmographics
Firmographics- Name
- Yulong Optoelectronics
- Legal name
- 昆明宇隆光电技术有限公司
- Website
- https://cn.optolong.com
- Company type
- Private
- Founded year
- 1999
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Yulong Optoelectronics (Optolong) is a 1999-founded Kunming-based manufacturer of precision optical filters serving amateur and professional astrophotographers, fluorescence microscopy labs, and industrial OEM clients globally through 30+ country dealer network.
- Ownership category
- akta.pro rank
Yulong Optoelectronics industry classification
Industry- Product category
- Optical Filters
- NAICS
- Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345), Analytical Laboratory Instrument Manufacturing (334516)
- SIC
- Optical Instruments & Lenses (3827), Photographic Equipment & Supplies (3861)
- akta.pro primary industry
- Optoelectronic Components (LEDs, photodiodes, optocouplers, optical sensors) (IMAGAJAF)
- akta.pro secondary industry
- Lenses & Optical Accessories (Lenses, Filters, Adapters, Teleconverters) (CRACAPAF)
Keywords
Where Yulong Optoelectronics is headquartered
LocationHeadquarters
- HQ city
- Kunming
- HQ country
- China
- HQ region
- Asia
Offices1 record
Markets served
Yulong Optoelectronics business model
Business model- GTM type
- B2B and B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Operations, Technology or R&D, Personnel, Supply Chain, Marketing or Sales, Infrastructure
Revenue model
- Proprietary Astronomical Filter Products: Self-branded astronomical filters including L-Pro, UHC, H-Beta, O-III, H-Alpha, SII, LRGB, and specialty narrowband filters sold directly and through dealers globally.
- Fluorescence Filter Products: Fluorescence filters for scientific applications including fluorescence microscopy, medical diagnostics, and life sciences. Supports BFP, CFP, GFP, YFP, DAPI, FITC, TRITC, and custom wavelengths.
- OEM and Custom Optical Filter Manufacturing: Custom design, prototyping, and mass production of optical filters including band-pass, UV/IR cut, beam splitters, dichroic mirrors, and anti-reflection coatings for industrial and scientific clients.
- Custom Interference Filters: Customized optical coating solutions for machine vision, medical equipment, industrial inspection, and laser optoelectronics applications.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | L-Ultimate 3nm Dual Narrowband Filter |
| One time/ perpetual license | Pay-as-you-go | Sony Magnetic In-Camera Filter (L-Pro) |
Go-to-market motion3 records
Distribution channels5 records
Marketing channels7 records
Yulong Optoelectronics product offering
Product offeringCore offering
Kunming Yulong Optoelectronics (Optolong) designs, manufactures, and sells precision optical filters centered on astronomical photography filters (L-Pro, L-Ultimate, L-Para, L-Synergy, L-eNhance, L-Quad Enhance, H-Beta, O-III, CLS, SHO sets) and fluorescence filters for scientific microscopy. The company also offers custom bandpass, UV/IR cut, beam splitters, dichroic mirrors, and OEM manufacturing services for industrial, medical, and machine vision applications.
Product overview
Yulong Optoelectronics (Optolong) is a manufacturer of precision optical filters founded in 1999, specializing in astronomical photography filters and fluorescence filters. The product portfolio centers on five main categories: (1) Star Field/Astro Photography Filters (星野滤镜) including the flagship L-Pro multi-bandpass filter, Clear Sky front-mounted filter, and built-in camera filters for Canon, Nikon, and Sony; (2) Deep Sky Filters (深空滤镜) including L-Ultimate 3nm, L-Para, L-eNhance, L-Quad Enhance, SHO narrowband filter sets (3nm/7nm), LRGB, O-III, H-Beta, CLS, CLS-CCD, and UHC filters; (3) Planetary Filters (行星滤镜) including UV/IR Cut, RGB, and IR 685 filter kits; (4) Camera Built-in Filters (相机内置) for various mirrorless and DSLR camera brands; and (5) Fluorescence Filters (荧光滤光片) supporting multiple fluorophores (DAPI, FITC, TRITC, Cy3, Cy5, etc.) for microscopy. The company also offers custom optical filters, beam splitters, dichroic mirrors, UV/IR filters, and OEM services for industrial, medical, and scientific applications.
Differentiator
Problem solved
Functional benefit
Products and services
- L-Pro (Flagship Multi-Bandpass Light Pollution Filter) Flagship multi-bandpass light pollution suppression filter for amateur and professional astrophotographers targeting deep sky objects and Milky Way imaging; preserves color reproduction while suppressing urban light pollution.
- L-Ultimate 3nm Dual Narrowband Filter Dual 3nm narrowband filter with OIII and H-Alpha high transmission and OD4+ blocking for severe light pollution; for advanced astrophotographers using monochrome or color cameras in heavily light-polluted environments.
- L-Para Dual Narrowband 10nm Filter Dual narrowband 10nm light pollution filter designed for fast optical systems (F2 and faster, including RASA and Hyperstar); for astrophotographers using fast telescopes.
- L-eNhance Color Camera Dual Narrowband Filter Dual bandpass filter for DSLR and color CMOS/CCD cameras; allows H-Alpha, H-Beta, and OIII nebula emission lines while filtering light pollution, suited for one-shot color astrophotography.
- L-Quad Enhance Filter (L-QEF) Four-bandpass light pollution suppression filter for color cameras; balances color reproduction while suppressing mercury, sodium, and LED light pollution for Milky Way and deep sky imaging.
- L-Synergy 7nm Dual-Band (SII-OIII) Narrowband Filter 7nm dual-band (SII-OIII) narrowband light pollution reduction filter for color cameras; for advanced astrophotographers using one-shot color imaging systems for Hubble palette results.
- Clear Sky Front-Mounted UV Filter Front-mounted UV filter that blocks city sodium and mercury lamp pollution, improving contrast and color reproduction for general astrophotography use.
- H-Beta Narrowband Filter Narrowband filter for visual observation of 486nm hydrogen-beta emission line nebulae such as the Horsehead Nebula and California Nebula.
- O-III Narrowband Filter Narrowband filter for visual observation of doubly ionized oxygen emission nebulae (495.9nm and 500.7nm), with ~18nm FWHM bandwidth.
- UHC Ultra High Contrast Filter Ultra High Contrast broadband filter selectively blocking artificial mercury and sodium light and sky glow while allowing high transmission of OIII, H-Beta, NII, H-alpha, and SII emission lines.
- CLS City Light Suppression Filter Broadband City Light Suppression filter with >95% peak transmission for nebula emission lines; targets urban and suburban astrophotographers.
- CLS-CCD Filter Broadband filter for astronomical color CCD cameras and modified DSLRs, covering 300-1100nm with >95% emission line transmittance and >OD3 light pollution blocking.
- LRGB AR Deep Sky Filter Set LRGB (Luminance, Red, Green, Blue) filter set with 1:1:1 RGB ratio and sRGB color accuracy for CCD deep sky and planetary photography.
- SHO 3nm Filter Set (Hubble Palette) SII 3nm / H-Alpha 3nm / OIII 3nm narrowband filter set for Hubble palette (SHO) imaging with monochrome CCD/CMOS cameras and modified DSLRs.
- Planetary Filter Set (UV/IR Cut + RGB + IR 685) Planetary photography filter set containing UV/IR Cut, RGB, and IR 685 filters (5 pieces total) for improving image clarity and reducing atmospheric distortion.
- Optolong Canon EOS-R Built-in Filter Built-in light pollution filter designed specifically for Canon EOS-R mirrorless cameras, installed inside the camera body.
- Optolong Sony Magnetic Snap-on Built-in Filter Magnetic snap-on built-in filter for Sony mirrorless cameras with 1-second quick installation and removal; aimed at owners of Sony full-frame mirrorless bodies.
- L2 Dual-Combo Set Filter combination set for dual narrowband and wideband stacking photography, allowing users to combine complementary L-series filters.
- Fluorescence Filter Sets Fluorescence filter sets for microscopy supporting BFP, CFP, GFP, YFP, DAPI, FITC, TRITC, Texas Red, mCherry, Cy3, Cy5, Cy5.5, ICG, FISH Aqua/Green/Red/Orange, dual-bandpass and triple-bandpass variants; for research labs, universities, hospitals, and medical equipment manufacturers.
- Custom OEM Optical Filter Manufacturing Custom OEM/ODM optical filter design, prototyping, and mass production services including bandpass, UV/IR cut, beam splitters, dichroic mirrors, and anti-reflection coatings; for industrial, scientific, and medical equipment clients.
Quantifiable outcome
- High transmittance (>85%) for nebula emission lines (H-alpha 656.3nm, OIII 500.7nm) in narrowband filters
- +3 more outcomes
Companies that use Yulong Optoelectronics
Customer profileNamed customers8 records
Segments3 records
Ideal customer profiles3 records
Yulong Optoelectronics technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Yulong Optoelectronics partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core and regional.
- Global Distributor NetworkcoreOptolong has established a global distribution network with authorized dealers in over 30 countries worldwide, making their astronomical filters accessible to amateur and professional astronomers globally.
- 深圳宇宙光电 (Shenzhen Universe Optoelectronics)regionalAuthorized dealer in Shenzhen handling sales and distribution of Optolong products in the Guangdong region.
- 梦天天文 (Dream Sky Astronomy)regionalAuthorized dealer in Kunming for Optolong astronomical filter products.
- 学徒者天文regionalAuthorized dealer in Kunming for Optolong astronomical filter products.
- 云南省天文爱好者协会 (Yunnan Amateur Astronomers Association)coreOptolong serves as a council member and sponsor of the Yunnan Amateur Astronomers Association, participating in annual Street Astronomy Night events since 2015.
- 中科院云南天文台 (Yunnan Observatories, Chinese Academy of Sciences)regionalCo-organizer of astronomy outreach events and scientific education activities with the CAS Yunnan Observatories.
Scale indicators4 records
Recent moves6 records
Expansion highlights5 records
Yulong Optoelectronics competitors and assessment
Company assessmentBroad incumbents
- Edmund Optics: Global broad-line optics manufacturer and distributor with an extensive filter catalog (bandpass, dichroic, notch, fluorescence) overlapping Optolong's industrial and OEM optical filter offerings, but not specialized in astronomy.
- Thorlabs: US-based broad-line photonics and optics manufacturer offering filters, optics, and optical components; overlaps with Optolong's OEM/custom filter business but serves a much wider portfolio across laser, imaging, and quantum.
Direct peers
- Chroma Technology: US-based manufacturer of high-performance optical filters for fluorescence microscopy, life sciences, and astronomy — directly comparable to Optolong's fluorescence filter line and scientific-grade bandpass coatings.
- Knight Optical: UK-based custom optical component and filter manufacturer serving scientific and industrial OEM customers, comparable to Optolong's custom bandpass, dichroic, and beam-splitter OEM services.
- Baader Planetarium: Established German manufacturer of astronomical filters, telescope accessories, and optics with comparable narrowband and broadband product families overlapping directly with Optolong's deep-sky filter portfolio.
- Semrock (IDEX Health & Science): US manufacturer of hard-coated optical filters for life sciences, fluorescence microscopy, and laser-based instrumentation; the closest Western benchmark for Optolong's fluorescence and OEM bandpass filter business.
- Astronomik: German premium manufacturer of interference filters dedicated to amateur and professional astronomical photography, the closest direct competitor to Optolong's L-Pro, L-Ultimate, and UHC lineup.
- IDAS (Hutech): Japanese manufacturer of interference filters for astrophotography (NB1, LPS series) with comparable narrowband and light-pollution suppression positioning versus Optolong's L-eNhance, L-Quad, and L-Ultimate.
- Omega Optical: US manufacturer of custom optical interference filters for scientific, medical, and industrial applications, comparable to Optolong's OEM/custom bandpass, UV/IR, and dichroic offerings.
- Antlia: Chinese manufacturer of astronomical narrowband and LRGB filters with overlapping target customers (amateur and professional astrophotographers) and similar China-based cost-competitive positioning to Optolong.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Yulong Optoelectronics social profiles
Digital presenceYulong Optoelectronics compliance and trust
Trust signalCompliance5 records
Yulong Optoelectronics financial estimates
Financial estimateRevenue estimate
Valuation estimate
Yulong Optoelectronics leadership team
Management profileNumber of profiles
Yulong Optoelectronics funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Yulong Optoelectronics M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Yulong Optoelectronics
What does Yulong Optoelectronics do?
Kunming Yulong Optoelectronics (Optolong) designs, manufactures, and sells precision optical filters centered on astronomical photography filters (L-Pro, L-Ultimate, L-Para, L-Synergy, L-eNhance, L-Quad Enhance, H-Beta, O-III, CLS, SHO sets) and fluorescence filters for scientific microscopy. The company also offers custom bandpass, UV/IR cut, beam splitters, dichroic mirrors, and OEM manufacturing services for industrial, medical, and machine vision applications.
Is Yulong Optoelectronics a public or private company?
Yulong Optoelectronics is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Yulong Optoelectronics founded?
Yulong Optoelectronics was founded in 1999. It employs 51 to 100 people.
Where is Yulong Optoelectronics based?
Yulong Optoelectronics is headquartered in Kunming, China, in the Asia region.
How does Yulong Optoelectronics make money?
Four revenue lines are on record. Proprietary Astronomical Filter Products are the primary driver. The others are fluorescence Filter Products, OEM and Custom Optical Filter Manufacturing and custom Interference Filters.
Who are Yulong Optoelectronics's main competitors?
Broad incumbents on record are Edmund Optics and Thorlabs. Direct peers are Chroma Technology, Knight Optical, Baader Planetarium, Semrock (IDEX Health & Science), Astronomik, IDAS (Hutech), Omega Optical and Antlia.
Does Yulong Optoelectronics have an API?
No public API is recorded for Yulong Optoelectronics.
What industry is Yulong Optoelectronics in?
Yulong Optoelectronics's product category is Optical Filters. Its primary akta.pro industry code is IMAGAJAF, Optoelectronic Components (LEDs, photodiodes, optocouplers, optical sensors), with a secondary code of CRACAPAF, Lenses & Optical Accessories (Lenses, Filters, Adapters, Teleconverters). Its NAICS code is 3345 and its SIC code is 3827.