License

OpenCAL is developed by the Computed Axial Lithography group at the University of California, Berkeley.

Copyright © 2026 The Regents of the University of California. All Rights Reserved.

The OpenCAL hardware and design files are distributed under the Open Community License (OCL v1.1) together with the General Attribution (GAtt v1) and Research & Development (RnD v1) add-on conditions (referenced as OCL v1.1 + GAtt v1 + RnD v1). The OpenCAL software is licensed separately under the UC Regents license (see Software (UC Regents License) below).

Open Community License (OCL v1.1)

OCL pertains to intellectual property applied in licensor’s product (licensed item – hardware and/or software) and/or its components which is distributed as is under OCL, including copyright, registered design or design patent, and (utility) patent.

All licensor’s copyrights, designs, and patents as far as relevant to products and/or its components under OCL are COMMUNITY-OPEN, as the aim of OCL is to allow open access to relevant community including the essential right, the right-to-repair, by giving users complete freedom of use, copy, modification, and hack, while promoting a fair competition by securing intellectual property rights to prevent vendor lock-in and patent trolling.

NOTE that any component provided under a license incompatible with OCL and as such included in or distributed alongside the product and/or its component remains unaffected by OCL.

Also NOTE that OCL does not override imperative exceptions and limitations under applicable law.

As a non-commercial END USER

YOU MAY use, copy, modify, hack the product and/or its components as you wish!

YOU SHOULD support the community by sharing your creations and modifications.

If you distribute your creations, modifications, or any such derivatives YOU MUST do so under OCL allowing other community members to do everything that YOU MAY. This does not concern your creations and modifications that are not derived from the product and/or its components.

As a commercial BUSINESS USER

YOU MAY use the product and modify it to your use case solely for your internal business use (including internal production).

YOU MUST NOT copy or in any way replicate the product and/or its components and/or its derivatives for any commercial purpose excluding your internal right-to-repair without obtaining a separate business license or repair license.

Licensor’s products and/or its components under OCL MUST NOT BE subject to any systematic or automated text and/or data mining or other text and/or data collection activity in relation to the product without explicit permission.

Licensor may expand conditions of OCL distribution only by including add-on conditions (one or more) defined and provided in OCL repository. Any distribution under OCL requires clear reference to an OCL version and applicable add-on conditions and their version. Any allowed distribution of derivatives must retain applicable add-on conditions.

To promote ease of understanding of OCL licensor may keep and update a database of products and/or its components licensed under OCL and good practice.

Open Community License – General Attribution (GAtt v1)

GAtt serves solely as an add-on condition for OCL distribution and is effective only if specifically referenced in said OCL distribution (OCL v* + GAtt v1 or Open Community License v* + General Attribution v1). Such add-on only adds further binding license condition without any change or invalidation of any part of OCL.

As a non-commercial END USER

If you distribute your creations, modifications, or any such derivatives YOU MUST reasonably and in a common manner retain and represent in your distribution the identification of the creator/s of the product and/or its components and its derivatives on which your derivative is based.

In respect to practical representation limitations YOU MUST retain and represent AT LEAST the identification of the creator/s of the product and/or its components, and if applicable the identification of the creator/s of the last derivative, on which your derivative is based.

In case of tangible means of distribution and in respect to practical representation limitations, the representation COULD be in a form of an attached tag.

Open Community License – Research & Development (RnD v1)

RnD serves solely as an add-on condition for OCL distribution and is effective only if specifically referenced in said OCL distribution (OCL v* + RnD v1 or Open Community License v* + Research & Development v1). Such add-on only adds further binding license condition without any change or invalidation of any part of OCL.

As a commercial BUSINESS USER

Your internal business use MEANS SOLELY research and development.

YOU MAY use the product and/or its components and/or its derivatives for experiments or prototyping in order to develop your own independent creations not derived from the product and/or its components.

YOU MUST NOT use the product and/or its components and/or its derivatives for manufacturing beyond the scope of what YOU MAY without obtaining a separate business license.

Software (UC Regents License)

The OpenCAL software is also provided under the UC Regents license: free for educational, research, and non-profit noncommercial use (with the conditions that any distributed modifications are licensed under the same terms, include their source, and identify the changes and their dates); internal use is permitted for other entities; and commercial use requires a separate agreement with the University of California. The software is provided “as is,” without warranty of any kind, and no patent rights are granted. See the full text in the OpenCAL repository.

Commercial / business licensing and inquiries: University of California, Berkeley, Office of Technology Licensing (OTL), via the Berkeley Intellectual Property & Industry Research Alliances (IPIRA):